What is Bitcoin mining?

[admin]

What is Bitcoin mining?
Bitcoin mining refers to the process through which new Bitcoins are created and given to computers helping to maintain the network. The computers involved in Bitcoin mining are in a sort of computational race to process new transactions coming onto the network. The winner -- generally the person with the fastest computers -- gets a chunk of new Bitcoins, 12.5 of them right now. (The reward is halved every four years.)
There is generally a new winner about every 10 minutes, and there will be until there are 21 million Bitcoins in the world. At that point, no new Bitcoins will be created. This cap is expected to be reached in 2140. So far, about 16 million Bitcoin have been distributed.
Every Bitcoin in existence was created through this method and initially given to a computer helping to maintain the records. Anyone can set his or her computer to mine Bitcoin, but these days only people with specialized hardware manage to win the race.
Are there Bitcoin competitors?
Plenty. But these other virtual currencies do not have as many followers as Bitcoin, so they are not worth as much. As in the real world, a currency is worth only as much as the number of people willing to accept it for goods and services.
Who is Satoshi Nakamoto?
Bitcoin was introduced in 2008 by an unknown creator going by the name of Satoshi Nakamoto, who communicated only by email and social messaging. While several people have been identified as likely candidates to be Satoshi, as the creator is known in the world of Bitcoin, no one has been confirmed as the real Satoshi, and the search has gone on.
Satoshi created the original rules of the Bitcoin network and then released the software to the world in 2009. Satoshi largely disappeared from view two years later. Anyone can download and use the software, and Satoshi now has no more control over the network than anyone else using the software.

What is Bitcoin? [The Most Comprehensive Step-by-Step Gu >
What is Bitcoin and how does it work?
Definition: Bitcoin is a cryptocurrency, a form of electronic cash. It is a decentralized digital currency without a central bank or single administrator that can be sent from user to user on the peer-to-peer bitcoin blockchain network without the need for intermediaries.
Updated April 2019.
If you want to know what is Bitcoin, how you can get it and how it can help you, without floundering into technical details, this guide is for you. It will explain how the system works, how you can use it for your profit, which scams to avoid. It will also direct you to resources that will help you store and use your first pieces of digital currency. If you are looking for something even more in detail please check out our blockchain courses on bitcoin.
What is Bitcoin in a nutshell.
Small wonder that Bitcoin emerged in 2008 just after Occupy Wall Street accused big banks of misusing borrowers' money, duping clients, rigging the system, and charging boggling fees. Bitcoin pioneers wanted to put the seller in charge, eliminate the middleman, cancel interest fees, and make transactions transparent, to hack corruption and cut fees . They created a decentralized system, where you could control your funds and know what was going on.
Bitcoin has come far in a relatively short time. All over the world, companies, from REEDS Jewelers , a large jewelry chain in the US, to a private hospital in Wa rsaw, Poland, accept its currency. Billion dollar businesses such as Dell, Expedia, PayPal, and Microsoft do, too. Websites promote it, publications such as Bitcoin Magazine publish its news, forums discuss cryptocurrency and trade its coins. It has its application programming interface (API), price index, and exchange rate.
Problems include thieves hacking accounts, high volatility, and transaction delays. On the other hand, people in third world countries may find Bitcoin their most reliable channel yet for giving or receiving money.
Buy Bitcoin.
Key Metrics:
Key Highlights.
October 31, 2008: Bitcoin whitepaper published. January 3, 2009: The Genesis Block is mined. January 12, 2009: The first Bitcoin transaction. December 16, 2009: Version 0.2 is released. November 6, 2010: Market cap exceeds $1 million USD. October 2011: Bitcoin forks for the first time to create Litecoin. June 3, 2012: Block 181919 created with 1322 transactions. It is the largest block to-date. June 2012: Coinbase launches. September 27, 2012: Bitcoin Foundation is formed. February 7, 2014: Mt. Gox hack. June 2015: BitLicense gets established. This is one of the most significant cryptocurrency regulations. August 1, 2017: Bitcoin forks again to form Bitcoin Cash. August 23, 2017: SegWit gets activated. September 2017: China bans BTC trading. December 2017: First bitcoin futures contracts were launched by CBOE Global Markets (CBOE) and the Chicago Mercantile Exchange (CME). September 2018: Cryptocurrencies collapsed 80% from their peak in January 2018, making the 2018 cryptocurrency crash worse than the Dot-com bubble's 78% collapse. November 15, 2018: Bitcoin's market cap fell below $100 billion for the first time since October 2017. October 31, 2018: 10-year anniversary of Bitcoin.
Understanding Bitcoin - What is Bitcoin in-depth?
Understanding Bitcoin - What is Bitcoin in-depth?
At its simplest, Bitcoin is either virtual currency or reference to the technology. You can make transactions by check, wiring, or cash. You can also use Bitcoin (or BTC), where you refer the purchaser to your signature, which is a long line of security code encrypted with 16 distinct symbols. The purchaser decodes the code with his smartphone to get your cryptocurrency. Put another way; cryptocurrency is an exchange of digital information that allows you to buy or sell goods and services.The transaction gains its security and trust by running on a peer-to-peer computer network that is similar to Skype, or BitTorrent, a file-sharing system.
Bitcoin Transactional properties:
1.) Irreversible : After confirmation, a transaction can't be reversed. By nobody. And nobody means nobody. Not you, not your bank, not the president of the United States, not Satoshi, not your miner. Nobody. If you send money, you send it. Period. No one can help you, if you sent your funds to a scammer or if a hacker stole them from your computer. There is no safety net.
2.) Pseudonymous: Neither transactions or accounts are connected to real-world >
3.) Fast and global: Transaction is propagated nearly instantly in the network and are confirmed in a couple of minutes. Since they happen in a global network of computers they are completely indifferent of your physical location. It doesn't matter if I send Bitcoin to my neighbor or to someone on the other side of the world.
4.) Secure: Bitcoin funds are locked in a public key cryptography system. Only the owner of the private key can send cryptocurrency. Strong cryptography and the magic of big numbers makes it impossible to break this scheme. A Bitcoin address is more secure than Fort Knox.
5.) Permissionless : You don't have to ask anybody to use cryptocurrency. It's just a software that everybody can download for free. After you installed it, you can receive and send Bitcoins or other cryptocurrencies. No one can prevent you. There is no gatekeeper.
The creator of bitcoin figured out a way to let two entities confidently trade directly with one another, without the need to rely on all these intermediaries. The key is mathematics. As long as we both trust in math, we can be confident the exchange to occur as expected.
Bitcoin uses public key cryptography and an innovative approach to bookkeeping to achieve the authorization, balance verification, prohibition on double spending, delivery of assets and record inalterability described above. And it happens in near real time at no cost.
Cryptography ensures authorization. You need a private key to transact. And your key is complex enough that it would take the best computer longer than the earth has existed to crack it. In other words, it's essentially unhackable.
- Director of Communications at Overstock.com and Chief Evangelist at t0.com.
Where can I find Bitcoins?
First, we would recommend you read this in-depth guide for buying Bitcoin.
You can get your first bitcoins from any of these four places.
A cryptocurrency exchange where you can exchange 'regular' coins for bitcoins, or for satoshis, which are like the BTC-type of cents. Resources: Coinbase and Coinsquare in the US & Canada, and BitBargain UK and Bittylici o us in the UK. A Bitcoin ATM (or cryptocurrency exchange) where you can change bitcoins or cash for another cryptocurrency. Resources: Your best bets are BTER and CoinCorner A classified service where you can find a seller who will help you trade bitcoins for cash. Resources: The definitive site is LocalB i tcoins . You could sell a product or service for bitcoins. Resources: Sites like Purse .
Caution! Bitcoin is notorious for scams, so before using any service look for reviews from previous customers or post your questions on the Bitcoin forum .

[admin]

How does Bitcoin work?
"Unlike traditional currencies, which are issued by central banks, Bitcoin has no central monetary authority. Instead it is underpinned by a peer-to-peer computer network made up of its users' machines, akin to the networks that underpin BitTorrent, a file-sharing system, and Skype, an audio, v >mathematically generated as the computers in this network execute difficult number-crunching tasks, a procedure known as Bitcoin "mining". The mathematics of the Bitcoin system were set up so that it becomes progressively more difficult to "mine" Bitcoins over time, and the total number that can ever be mined is limited to around 21 million. There is therefore no way for a central bank to issue a flood of new Bitcoins and devalue those already in circulation."
How can I store my bitcoins?
To see how the system works, imagine someone called Alice who's trying out Bitcoins. She'd sign up for a cryptocurrency wallet to put her bitcoins in.
The Bitcoin Wallets.
There are three different applications that Alice could use.
Full client - This is like a standalone email server that handles all aspects of the process without relying on third-party servers. Alice would control her whole transaction from beginning to end by herself. Understandably, this is not for beginners. Lightweight client - This is a standalone email client that connects to a mail server for access to a mailbox. It would store Alice's bitcoins, but it needs a third-party-owned server to access the network and make the transaction. Web client - This is the opposite of "full client" and resembles webmail in that it totally relies on a third-party server. The third party replaces Alice and operates her entire transaction.
You'll find wallets that come in five main types: D esktop, mobile, web, paper and hardware. Each of these has its advantages and disadvantages .
How do I buy and sell stuff with Bitcoins?
Here's the funny thing with Bitcoins: there are no physical traces of them as of dollars. All you have are only records of transactions between different addresses, with balances that increase and decrease in their records that are stored on the blockchain.
To see how the process works, let's return to Alice.
Example of a Bitcoin transaction.
Alice wants to use her Bitcoin to buy pizza from Bob. She'd send him her private "key," a private sequence of letters and numbers, which contains her source transaction of the coins, amount, and Bob's digital wallet address. That "address" would be another, this time, the public sequence of letters and numbers. Bob scans the "key" with his smartphone to decode it. At the same time, Alice's transaction is broadcast to all the other network participants (called "nodes") on her ledger, and, approximately, ten minutes later, is confirmed, through a process of certain technical and business rules called "mining." This "mining" process gives Bob a score to know whether or not to proceed with Alice's transaction.
The transaction between Alice and Bob.
What is Bitcoin Mining?
Mining, or processing, keep the Bitcoin process secure by chronologically adding new transactions (or blocks) to the chain and keeping them in the queue. Blocks are chopped off as each transaction is finalized, codes decoded, and bitcoins passed or exchanged.
Miners can also generate new bitcoins by using special software to solve cryptographic problems . This provides a smart way to issue the currency and also provides an incentive for people to mine.
The reward is agreed-upon by everyone in the network but is generally 12.5 bitcoins as well as the fees paid by users sending transactions. To prevent inflation and to keep the system manageable, there can be no more than a fixed total number of 21 million bitcoins (or BTCs) in circulation by the year 2040, so the "puzzle" gets increasingly harder to solve.
What do I need to know to protect my Bitcoins?
Here are four pieces of advice that will help your bitcoins go further.
As you'd do with a regular wallet, only store small amounts of bitcoins on your computer, mobile, or server for everyday uses, and keep the remaining part of your funds in a safer environment.
Backup your wallet on a regular basis and encrypt your wallet or smartphone with a strong password to protect it from thieves (although, unfortunately, not against keylogging hardware or software). Store some of your bitcoins in an offline wallet disconnected from your network for added security. Think of this as a bank, while you, generally, keep only some of your money in your wallet. Update your software. For added protection, use Bitcoins' multi-signature feature that allows a transaction to require multiple independent approvals to be spent.
Spending some time on these steps can save your money.
We recommend the Nano Ledger S - Hardware Wallet.
Nano Ledger S is just as secure as the other two hardware wallets. It is popular because of its relatively low price of $65 compared to its competitors. Being smaller than KeepKey, it is more portable and easier to carry around. It is a hardware wallet that comes at a very competitive price.
Important Bitcoin Charts.
Bitcoin Performance over the months.
The chart above is a candlestick representation of Bitcoin's price over the months. Pay attention to the last eight candlesticks. From August 2018 to January 2019, Bitcoin has had six consecutive red candlesticks. What this shows is that for those six months, Bitcoin has been in loss. However, the two latest months are green, in other words, they were profitable months.
Total Transaction fees collected in the last ten 10 days.
24th April saw the most transaction fees collected with 131 BTC given away as transaction fees.
Total transactions conducted in the last 10 days.
When it comes to the total number of transactions sent per day, we can make some interesting observations:
Total daily transactions fluctuate between 300,000 - 400,000. 24th April saw the most transactions in our data set with 404,279. 23rd April saw the least amount of transactions in our data set with 311,753. In our data set, 24th April saw the most number of transactions and most transaction fees collected. Interestingly, 23rd April didn't coincide with the least number of transaction fees collected. The least total amount of transaction fees was collected on 21st April, which also saw the second highest number of transactions!
Average daily transaction fees for the last 10 days.
Till now we have total transaction fees collected and the total number transactions executed. Now, we can use these two to find out how much was the average daily transaction fees. The formula is simple:
Average transaction fees = Total transaction fees collected / Total number of transactions.
24th April has the highest daily average transaction fees with 0.00032 BTC. 21st April has the least daily average transaction fees with 0.00012 BTC, despite having the second highest number of transactions in our dataset. Upon further calculation, we discovered that the average transaction fees for the last 10 days was 0.00022 BTC or $1.13.
Total daily transaction value sent over the last 10 days.
Right off the bat, 24th April sticks out yet again. On that day, 279,421 BTC was transferred. 21st April saw the least number Bitcoins transferred with 65,431 BTC. Only on 20th and 21st April were less than 100,000 BTC transferred. Over the last 10 days, the average amount of BTC sent daily was 140,488 BTC.
The average value of each transaction.
We can use a simple formula to calculate the average value of each transaction: Total BTC sent that day/Total number of transactions.
On 24th April, the average value of each transaction sent was the highest at 0.473 BTC. 21st April had the least with 0.167 BTC. 17th and 23rd April also saw high values with 0.473 BTC and 0.477 BTC respectively. If we take an average of all these values, then we get, 0.387 BTC or $2002 . We can infer that for a transaction worth $2002 we only need to send $1.13 in transaction fees. So transaction fees in our data set is 0.56%. For that same transaction, PayPal would have charged you $58.30 (calculated via salecalc ).
The graph above shows how many addresses own a particular range of Bitcoins. There are only five addresses which own more than 100,000 BTC. 98 addresses own 10,000-100,000 Bitcoins. A huge chunk of the addresses (45.5%) either own 0.0001-0.001BTC or 0.001-0.01 BTC.

[admin]

What else do I need to know?
Protect your address: Although your user identity behind your address remains anonymous, Bitcoin is the most public form of transaction with anyone on the network seeing your balances and log of transactions. This is one reason why you should change Bitcoin addresses with each transaction and safeguard your address. You can also use multiple wallets for different purposes so that your balance and transaction history remain private from those who send you money.
Your confirmation score: As said, you receive a confirmation score of about 10 minutes before you make your purchase. Different wallets have their own reading.
Government taxes and regulations : Government and local municipalities require you to pay income, sales, payroll, and capital gains taxes on anything that is valuable - and that includes bitcoins. The legal status of Bitcoin varies from country to country, with some still banning its use. Regulations also vary with each state. In fact, as of 2016, New York state is the only state with a bitcoin rule, commonly referred to as a BitLicense . As shown in the Table above, zero is the least with the number 3 being the most reliable for average bitcoin transfers. If you're sending or paying for, something valuable, wait until you, at least, receive a 6.
What are the disadvantages of Bitcoin?
Bitcoin got off on the wrong foot by claiming an apocryphal person (or persons), Satoshi Nakamoto as its founder. Nakamoto has never been found.
Regarding more practical concerns, hacking and scams are the norms. They happen at least once a week and are getting more sophisticated. Bitcoin's software complexity and the volatility of its currency dissuade many people from using it, while its transactions are frustratingly slow. You'll have to wait at least ten minutes for your network to approve the transaction. Recently, some Reddit users reported waiting more than one hour for their transactions to be confirmed.
Scams to watch out for.
The four most typical Bitcoin scams are Ponzi schemes, mining scams, scam wallets and fraudulent exchanges.
Ponzi Scams : Ponzi scams, or high-yield investment programs, hook you with higher interest than the prevailing market rate (e.g. 1-2% interest per day) while redirecting your money to the thief's wallet. They also tend to duck and emerge under different names in order to protect themselves. Keep away from companies that give you Bitcoin addresses for incoming payments rather than the common payment processors such as BitPay or Coinbase. Bitcoin Mining Scams : These companies will offer to mine outrageous amounts of bitcoin for you. You'll have to pay them. That's the last you'll see of your money (with no bitcoins to show for it, either). Bitcoin Exchange Scams : Bitcoin Exchange Scams offer features that the typical bitcoin wallets don't offer, such as PayPal/Credit Card processing, or better exchange rates. Needless to say, these scams leave you in the hang while they siphon your dollars. Bitcoin Wallet Scams : Bitcoin scam wallets are similar to online wallets - with a difference. They'll ask you for your money. If robbers like the amount, that's the last you'll see of your deposit. The address, in other words, leads to them, rather than to you.
Of all of these, wallet scams are the most popular with scammers managing to pinch millions.
What are the advantages of Bitcoin?
The best thing about Bitcoin is that it is decentralized, which means that you can settle international deals without messing around with exchange rates and extra charges. Bitcoin is free from government interference and manipulation, so there's no Federal Reserve System‍ to hike interest rates. It is also transparent, so you know what is happening with your money. You can start accepting bitcoins instantly, without investing money and energy into details, such as setting up a merchant account or buying credit card processing hardware. Bitcoins cannot be forged, nor can your client demand a refund.
It's small wonder that users call Bitcoin "Money 2.0" or that Bill Gates called it "a techno tour de force."
Tyler Winklevoss, co-creator of Facebook, summed it up when he said:
"We have elected to put our money and faith in a mathematical framework that is free of politics and human error."
Rick Falkvinge, Founder of the Swedish Pirate party, predicted that.
"Bitcoin will do to banks what email did to the postal industry."
According to John McAfee, Founder of McAfee,
"You can't stop things like Bitcoin. It will be everywhere and the world will have to readjust."
What is Bitcoin: Conclusion.
Where do I go from here?
Here are various resources that will direct you to best places for finding wallets, stores that accept bitcoins, exchanges for trading Bitcoin, and Bitcoin news, prices, charts, guides and analysis among other information.
Bitcoin has been through several obstacles recently with the Bitcoin Cash fork and SegWit implementation. Bitcoin, over the last 11 years, has truly disrupted the world's economy and financial systems. Having said that, this is just the beginning. The Bitcoin revolution still has a lot of miles to go. It is going to super exciting to see where we are going to go on from here.
99Bitcoins - 99Bitcoins supplies v >Bitcoin.org - Choose your Bitcoin wallet from 12 different mobile, desktop and hardware applications. Coinmap - For bitcoiners who want to spend their BTC at brick-and-mortar locations, Coinmap refers you to hundreds of retailers who accept bitcoin at their physical store locations. Blockchain.info - Blockchain info is the go-to place for checking transactions on the ledger. You can check how much money your wallet contains, or, for that matter, how much BTC is stored at any particular wallet address. Bitnodes - Run by the Bitcoin Foundation, Bitnodes estimates and visualizes the size of the bitcoin network. Wizbit - Wizbit shows all transactions and newly mined blocks in real time on an eye-catching spinning globe. We Use Coins - Weusecoins.com is a list of credible exchanges for trading Bitcoins worldwide or in the U.S. Buy Bitcoin Worldwide - Get help finding a Bitcoin exchange.
Like what you read? Give us one like or share it to your friends.
1) Q: What is Bitcoin?
2) Q: Who created Bitcoin?
3) Q: Is Bitcoin real money?
4) Q: How old is Bitcoin?
Like what you're reading?
Join our community and get access to over 50 free video lessons, workshops, and guides like this! No credit card needed!
Related Gu >
Demystifying DeFi: Ultimate Guide (2019) - Blockgeeks.
New Regime for French Digital Asset Service Providers.
5 Best Hardware Wallets: [The Most Comprehensive List] - Blockgeeks.
Binance VS Bittrex: Ultimate Crypto Exchange Comparison Guide.
What is an Initial Virtual Finance Asset Offering (IVFAO)? The Maltese Laws.
Rohit Duggal @cryptonooob.
Rohit Duggal @cryptonooob.
Shall be submitting your tutorial here - https://hackr.io/tutorials/learn-bitcoin Thank You.
paul retrop @superaffiliemrugmail-com.
paul retrop @superaffiliemrugmail-com.
very good beginner guide. thanks.
Anastasia Steel @madeinusagraygmail-com.
Anastasia Steel @madeinusagraygmail-com.
DO NOT PLAY BITCOIN IF YOU DO NOT KNOW ABOUT IT. There are a lot of person throw money out of the window just because they do not know the information about the Digital Currency. The new trend is always welcome, but you should be smart investors, do not let the page ads flickering comments that make you crazy insane believe. I have lost my mind, I joined the stream of bitcoin response because information will make easy money, young people sure have a few mistakes. And this mistake will probably help you a little miss. I joined the bitcoin a few years ago, Remitato floor is the floor I have chosen, after a time watching the Triggers evaluation, I decided to invest in it. With initial investment $ 1000, I bought 500 TRIG for 0.3200023 and after a few weeks worth 0.3400010, tends to go up, the newcomer saw the will to make a professional Trader Coin . But after that time the floor was hacked to make it freezing, I can not access and some other players said the number of coins in the account vanish without trace. After this incident, the TRAG has been falling completely, despite having recovered the account but the value of TRAG after several months did not go up and the floor of Remitano was disastrous despite gaining ownership. Still persist for a few weeks later hoping for the TRAG to go up but the scandal of the floor is not small. And I have since abandoned the Remitano floor. Unceasing hope, this time I have chosen Binance floor with safety and stability. Binance uses multi-layered architecture, and is committed to security for players. This time I only invested $ 500 because still worried about the safety of the floor. Binance has seen many surprises such as support Wechat software without the web plus low transaction fees, I have feelings for Binance though Binance has a little trouble can not recharge dollars As usual or payment by Visa card, Master card that need BTC or ETH, USDT. It is Binance's safety that has created the brand, more and more people are joining Binance and the floor value is also increasing, I bought 500 BNB at the price of 0.4134003 and lost only 0.05% of the transaction fee. BNB, much cheaper than Remitato. And after a few weeks the BNB price has increased to 0.5434232 and at present BNB has increased 100 times, I have poured 500 more BNB and the value is still increasing, I predict BNB will continue to go. up. And now is a good time to buy this coin. I have had the experience of playing at Remitato for a few months and Binance for 2 years. I gave you some knowledge about the two decks that I have been playing. But above all, security is still there. I do not want only because of the security of the floor of the player that pours money into the sea. But the mistake made me more knowledge for the next time to choose Binance. The Binance retains its reputation from the beginning to the present, choosing Binance as its brightest choice. Whether you are or are thinking of playing bitcoin, you should evaluate the floor of the pros and cons altogether, but do not believe a few comments and then the wrong as my first time. This is a review article of their own. Please interact in peace, not brick. Thank you.

[admin]

What is Bitcoin?
Share this with.
These are external links and will open in a new window.
These are external links and will open in a new window.
Close share panel.
The value of digital currency Bitcoin is making headlines again.
Amid volatile trade in November and December, it hit a peak of more than $17,000 at one point - a staggering rise, given that it started the year at $1,000.
So what exactly is Bitcoin, and what's behind the buying frenzy?
What is Bitcoin?
There are two key traits of Bitcoin: it is digital and it is seen as an alternative currency.
Unlike the notes or coins in your pocket, it largely exists online. Although there are some specialist ATMs which issue bitcoins, it may be best to think of them as being more like virtual tokens.
And secondly, Bitcoin is not printed by governments or traditional banks.
That means it is "not legal tender, you can't pay your taxes or use it to settle debts", says Dr Garrick Hileman of the Judge Business School at University of Cambridge.
Bitcoins are created through a complex process known as "mining", and then monitored by a network of computers across the world.
There's a steady stream of about 3,600 new bitcoins a day - with about 16.5 million now in circulation.
However, like all currencies its value is determined by how much people are willing to buy and sell it for.
Why has it gone up so much this year?
No one is entirely sure. Some say it's a classic economic bubble: frenzied investors paying far more for an asset than it's worth for fear of missing out.
They put it in the same bracket as the mania for Dutch tulip bulbs in the 1630s or internet companies in the dot.com boom.
Others point to the growing prospect of Bitcoin crossing over into the financial mainstream.
"Speculation is a big part of this, but there are signs of growing use," says Dr Hileman.
He says there were between three and six million people around the world actively using crypto-currency in April.
"Today it's probably closer to 10 to 20 million, so it's a very quickly growing user base," he says. That's the equivalent of a population the size of the Netherlands or Chile.
There has also been a boost by some large financial institutions, like the owner of the Chicago Mercantile Exchange, getting into the space, he adds.
How do people buy Bitcoin?
There are now thousands of different crypto-currencies, but Bitcoin is still the best-known. To receive a bitcoin a user must have a Bitcoin address - a string of 27 to 34 letters and numbers.
This acts as a kind of virtual postbox to and from which the bitcoins are sent.
There is no registry linking real names to addresses, which helps some Bitcoin users to protect their anonymity. Bitcoin wallets store the addresses and are used to manage savings.
They operate like privately-run bank accounts - with the proviso that if the data is lost, so are the bitcoins owned. Increasingly, users are often asked for ID to open a wallet.
The rules underpinning Bitcoin say that only 21 million bitcoins can be created - and that figure is getting ever nearer. It is unclear what will happen to the value of bitcoins when that limit is reached.
Can they use bitcoins to buy things?
The anonymity afforded by digital currencies has attracted people wanting to make illegal purchases on the internet.
However, a small but growing number of recognised businesses now allow customers to buy goods and services with Bitcoin.
They range from multinational firms like Microsoft and travel booking site Expedia, through to small businesses using it as something of a novelty, such as a sushi restaurant in Cambridge or an art gallery in London.
It is not the same as established currencies, like the US dollar, which can be used across the world to buy a coffee or pay for a hotel room.
A 900% rise in one year for a traditional currency would have major repercussions for consumers' spending power and the businesses that accept it.
But many Bitcoin owners don't use it to buy things.
"The vast majority of users - I would estimate upwards of 80% or 90% - get into the space for investment reasons," says Dr Hileman.
"So you see the term 'crypto-asset' being used to describe Bitcoin more than 'crypto-currency' these days."
What concerns do regulators have?
At the moment Bitcoin is largely unregulated, says Bradley Rice, an expert in financial regulation at the law firm Ashurst.
It has been widely used on the dark web, which cannot be accessed via a normal internet browser without using a workaround.
There are also concerns about its volatility. The chart below compares Bitcoin to the pound and euro. All the values start at 100 to compare the currencies more clearly.
Because of Bitcoin's much faster growth, the chart uses a different approach on the y-axis where the smaller the gap, the faster the increase.
China and South Korea have serious worries. They have banned the launch of new virtual currencies via so-called "initial coin offerings" - where companies or individuals issue their own digital currencies for investors to buy - and have been shutting down exchanges on which they are traded.
The UK's Financial Conduct Authority warned investors in September they could lose all their money if they buy digital currencies issued by firms, known as "initial coin offerings".
But the underlying technology of Bitcoin is regarded by some major financial institutions as bullet-proof.
"That's potentially why financial regulators [in Europe] are adopting largely a 'wait and see' approach," says Mr Rice.
Is it all a bubble?
There is no shortage of financial journalists or experts saying Bitcoin's surge is a bubble.
"There may be good reasons for buying bitcoin," an article in The Economist said recently. "But the dominant reason at the moment is that it is rising in price."
Bitcoin has doubled in value in the space of a month - which has led some to argue it is too volatile to be seen as a currency, and warned that a crash is inevitable.
However, Bitcoin has been "declared dead" a few times already, says Dr Hileman.
"It's shown some resilience and bounced back from some near-death experiences," he says.
At the same time, many would agree this is "very bubbly", and he predicts we may see a "spectacular crash again in the not-too-distant future".
"So hang on tight if you are a holder of these currencies," he concludes.

[admin]

What is Bitcoin?
Many people believe Bitcoin to be very complicated, when in fact it's a lot more simple and intuitive than what most people think. This series aims to help everyone get a grasp of the basics, and over time also present further learning opportunities for those that want to know more.
Bitcoin is often explained by comparing it to something specific people already know, but this is often what creates a lot of confusion. Bitcoin is a new technology that is unlike anything we have seen before, so a better way to think of it is as a combination of a few different things we are already used to:
Firstly, because it allows you to move money so easily, Bitcoin functions as a payment system, similar to bank transfers or credit cards, only a bit better.
Second, Bitcoin is in some sense similar to gold - that is why many people even refer to it as 'digital gold' or 'Gold 2.0'. Think of it as using gold for money, except it also very easy to move.
Third, Bitcoin is like the internet in that no single person or entity controls it, so anyone can pretty much use it as they like. This gives it some very unique characteristics.
These three characteristics also reinforce one another, so they are all interwoven. But more on all of this in the next few sections. For now, just imagine what would happen if you took a big pot and threw in a credit card, a piece of gold, and a hint of 'internet' - mix it all up - and pull out a brand new compound - Bitcoin!

[admin]

What is bitcoin.
Where do bitcoins come from? With paper money, a government decides when to print and distribute money. Bitcoin doesn't have a central government.
With Bitcoin, miners use special software to solve math problems and are issued a certain number of bitcoins in exchange. This provides a smart way to issue the currency and also creates an incentive for more people to mine.
Bitcoin is Secure.
Bitcoin miners help keep the Bitcoin network secure by approving transactions. Mining is an important and integral part of Bitcoin that ensures fairness while keeping the Bitcoin network stable, safe and secure.
Links.
We Use Coins - Learn all about crypto-currency. Bitcoin News - Where the Bitcoin community gets news. Bitcoin Knowledge Podcast - Interviews with top people in Bitcoin.
Bitcoin Mining Hardware Comparison.
Currently, based on (1) price per hash and (2) electrical efficiency the best Bitcoin miner options are:
AntMiner S7.
4.73 Th/s 0.25 W/Gh 8.8 pounds Yes N/A 0.1645.
AntMiner S9.
13.5 Th/s 0.098 W/Gh 8.1 pounds Yes N/A 0.3603.
Avalon6.
3.5 Th/s 0.29 W/Gh 9.5 pounds No N/A 0.1232.
Overview - Table of Contents Mining Hardware Comparison What is Bitcoin Mining? What is the Blockchain? What is Proof of Work? What is Bitcoin Mining Difficulty? The Computationally-Difficult Problem The Bitcoin Network Difficulty Metric The Block Reward.
Bitcoin mining is the process of adding transaction records to Bitcoin's public ledger of past transactions or blockchain . This ledger of past transactions is called the block chain as it is a chain of blocks. The block chain serves to confirm transactions to the rest of the network as having taken place.
Bitcoin nodes use the block chain to distinguish legitimate Bitcoin transactions from attempts to re-spend coins that have already been spent elsewhere.
What is Bitcoin Mining?
What is the Blockchain?
Bitcoin mining is intentionally designed to be resource-intensive and difficult so that the number of blocks found each day by miners remains steady. Individual blocks must contain a proof of work to be considered valid. This proof of work is verified by other Bitcoin nodes each time they receive a block. Bitcoin uses the hashcash proof-of-work function.
The primary purpose of mining is to allow Bitcoin nodes to reach a secure, tamper-resistant consensus. Mining is also the mechanism used to introduce Bitcoins into the system: Miners are paid any transaction fees as well as a "subsidy" of newly created coins.
This both serves the purpose of disseminating new coins in a decentralized manner as well as motivating people to provide security for the system.
Bitcoin mining is so called because it resembles the mining of other commodities: it requires exertion and it slowly makes new currency available at a rate that resembles the rate at which commodities like gold are mined from the ground.
What is Proof of Work?
A proof of work is a piece of data which was difficult (costly, time-consuming) to produce so as to satisfy certain requirements. It must be trivial to check whether data satisfies said requirements.
Producing a proof of work can be a random process with low probability, so that a lot of trial and error is required on average before a valid proof of work is generated. Bitcoin uses the Hashcash proof of work.
What is Bitcoin Mining Difficulty?
The Computationally-Difficult Problem.
Bitcoin mining a block is difficult because the SHA-256 hash of a block's header must be lower than or equal to the target in order for the block to be accepted by the network.
This problem can be simplified for explanation purposes: The hash of a block must start with a certain number of zeros. The probability of calculating a hash that starts with many zeros is very low, therefore many attempts must be made. In order to generate a new hash each round, a nonce is incremented. See Proof of work for more information.
The Bitcoin Network Difficulty Metric.
The Bitcoin mining network difficulty is the measure of how difficult it is to find a new block compared to the easiest it can ever be. It is recalculated every 2016 blocks to a value such that the previous 2016 blocks would have been generated in exactly two weeks had everyone been mining at this difficulty. This will yield, on average, one block every ten minutes.
As more miners join, the rate of block creation will go up. As the rate of block generation goes up, the difficulty rises to compensate which will push the rate of block creation back down. Any blocks released by malicious miners that do not meet the required difficulty target will simply be rejected by everyone on the network and thus will be worthless.
The Block Reward.
When a block is discovered, the discoverer may award themselves a certain number of bitcoins, which is agreed-upon by everyone in the network. Currently this bounty is 25 bitcoins; this value will halve every 210,000 blocks. See Controlled Currency Supply.
Additionally, the miner is awarded the fees paid by users sending transactions. The fee is an incentive for the miner to include the transaction in their block. In the future, as the number of new bitcoins miners are allowed to create in each block dwindles, the fees will make up a much more important percentage of mining income.
Bitcoin Mining™® © 2011-2018 Hesiod Services LLC | Terms | Privacy.

[admin]

[admin]

What is bitcoin.
I'm a big fan of Bitcoin. Regulation of money supply needs to be depoliticized.
Al Gore.
Bitcoin is a technological tour de force.
Bill Gates.
Every informed person needs to know about Bitcoin because it might be one of the world's most important developments.
Leon Louw.
What is Bitcoin?
With the Bitcoin price so volatile everyone is curious. Bitcoin, the category creator of blockchain technology , is the World Wide Ledger yet extremely complicated and no one definition fully encapsulates it. By analogy it is like being able to send a gold coin via email. It is a consensus network that enables a new payment system and a completely digital money.
It is the first decentralized peer-to-peer payment network that is powered by its users with no central authority or middlemen. Bitcoin was the first practical implementation and is currently the most prominent triple entry bookkeeping system in existence.
Who created Bitcoin?
The first Bitcoin specification and proof of concept was published in 2009 by an unknown individual under the pseudonym Satoshi Nakamoto who revealed little about himself and left the project in late 2010. The Bitcoin community has since grown exponentially.
Satoshi's anonymity often raises unjustified concerns because of a misunderstanding of Bitcoin's open-source nature. Everyone has access to all of the source code all of the time and any developer can review or modify the software code. As such, the identity of Bitcoin's inventor is probably as relevant today as the identity of the person who invented paper.
Who is involved in Bitcoin?
Over $1B of investment into Bitcoin and blockchain companies has taken place resulting in thousands of companies and hundreds of thousands of individuals involved from around the world.
What is the Blockchain?
Who controls the Bitcoin network?
Nobody owns the Bitcoin network much like no one owns the technology behind email or the Internet. Bitcoin transactions are verified by Bitcoin miners which has an entire industry and Bitcoin cloud mining options. While developers are improving the software they cannot force a change in the Bitcoin protocol because all users are free to choose what software and version they use.
In order to stay compatible with each other, all users need to use software complying with the same rules. Bitcoin can only work correctly with a complete consensus among all users. Therefore, all users and developers have a strong incentive to protect this consensus.
How does Bitcoin work?
From a user perspective, Bitcoin is nothing more than a mobile app or computer program that provides a personal Bitcoin wallet and enables a user to send and receive bitcoins.
Behind the scenes, the Bitcoin network is sharing a massive public ledger called the "block chain". This ledger contains every transaction ever processed which enables a user's computer to verify the validity of each transaction. The authenticity of each transaction is protected by digital signatures corresponding to the sending addresses therefore allowing all users to have full control over sending bitcoins.
Thus, there is no fraud, no chargebacks and no identifying information that could be compromised resulting in identity theft. To learn more about Bitcoin, you can consult the original Bitcoin whitepaper, read through the extremely thorough Frequently Asked Questions, listen to a Bitcoin podcast or read the latest Bitcoin news.
Sponsors for free Bitcoins.
Many people new to Bitcoin are curious about how to get some. Bitcoin faucets, places where bitcoins are given away for free, have been a part of spreading Bitcoin since the earliest days. But one problem is running out of bitcoins to give! That is why we have figured out a sustainable way to give away free bitcoins with sponsors.

[admin]

What is Bitcoin? Everything you need to know about the booming 'cryptocurrency' that's all the rage.
The basics of Bitcoin: Here's everything you need to know about how the virtual currency is made, and what keeps it secure.
15:00, 12 JUL 2018 Updated 12:24, 17 AUG 2018.
Bitcoin has been up and down in the last year but is a currency starting to come into the mainstream.
A surge towards the end of 2017 was followed by a crash soon after - but many predict that it has long-term potential.
As a technology though, cryptocurrencies are booming - thanks to their decentralised nature and encrypted security.
If you're still not sure about exactly what it is, we've taken a look at the 21st century currency below and explained everything about it.
What is Bitcoin?
Bitcoin was the first of what have become known as "cryptocurencies".
These are forms of digital money that use encryption to secure transactions and control the creation of new units.
The plan was to make a form of currency not controlled by governments or businesses, that you could trade globally with no cost and without having to reveal your identity.
The popularity of Bitcoin has spawned many copycats - sometimes called "altcoins".
To make things more confusing, there are also "second generation" virtual currencies like Ethereum and Bitcoin Cash.
So they're not like the coins in my purse or wallet?
No. They are essentially a line of numbered "code" - instructions used in computer programming.
However, once purchased they can be exchanged for some goods and services, like normal money.
Where d >
Created by a mysterious developer who uses the pseudonym Satoshi Nakamoto, Bitcoins exploded on to the financial scene in 2013, following enormous increases in their value.
In the original Bitcoin white paper, Nakamoto describes his creation as a "peer-to-peer version of electronic cash", allowing "online payments to be sent directly from one party to another without going through a financial institution".
How does Bitcoin work?
Nakamoto wrote that such a currency uses "cryptographic proof instead of trust, allowing any two willing parties to transact directly with each other without the need for a trusted third party".
This sort of stateless, bank-free currency uses a distributed, cryptographically secure "blockchain" to record payment transactions.
Recording of payments onto the blockchain is powered by users, who offer their computer power.
They are rewarded with newly created Bitcoins, and this activity is referred to as mining.
What determines their value?
Like many things, it comes down to supply and demand.
New Bitcoins are released at a rate of about 25 new coins every 10 minutes.
But the flow will dry up as they have been designed to ensure that no more than 21 million will ever exist. Today, around 16 million are in use.
How to get Bitcoin.
Bitcoins can be obtained in a number of different ways. It's possible to accept them as payment for goods or services.
You can also buy them directly from individuals or special websites called 'exchanges', such as Coinbase, that will swap Bitcoins for regular currency.
Free Bitcoin and Bitcoin Faucets.
While 'free bitcoin' may seem like something that lands in your spam folder, there is a legitimate way to get it with a Bitcoin Faucet.
A Bitcoin faucet is a type of award system either on a website or an app. The company running the faucet will send small amounts when you complete tasks such as watching videos or playing games.
Some of the most popular include:
The Cointiply mining game is one of the most popular games in the faucet community and lets you earn in the background, in addition to taking surveys.
Bitcoin wallets.
Bitcoin wallets are simply specially-designed programs that store your Bitcoin, the same way a regular wallet would store your cash.
They can be used either on a desktop computer or a smartphone and can be stored securely on the web so they can be accessed from anywhere.
How to mine.
Mining is a tricky process that involves solving a complex maths problem that takes both time and computing power. The more powerful your computer (and thus, the quicker you can crunch the numbers) means a more difficult problem.
Custom-built Bitcoin mining hardware and software is now available, allowing miners to find Bitcoins even faster.
Each miner also solves a dual function as they process and secure transactions on the block chain. But the more miners that join, the harder it becomes to find Bitcoins.
What is a Bitcoin miner?
A Bitcoin miner can be anyone that simply does it for fun right up to someone with the latest equipment who is attempting to mine for profit.
Bitcoin miners also join into pools that split the workload and gives each of them a share of the profits.
Read More.
The future of cryptocurrencies.
Second-generation cryptocurrencies include altcoins with more advanced functions, that harness the computing power of the blockchain.
An example is Ethereum - the blockchain can execute "smart contracts".
These are pieces of computer code that can interact with other coded contracts and perform work - for instance moving money around and making decisions.
The DAO platform that was hacked is written into the Ethereum blockchain and can autonomously operate without humans to control the organisation.
To decide what investments the DAO makes, its members vote on which proposed contacts will be included in the blockchain.
This could be the start of an autonomous financial future dictated by machines rather than humans.
Why have there been so many warnings about Bitcoin?
Partly because of fears that investors will lose a packet.
Firstly, Bitcoin has no central bank that stands behind it and isn't regulated by any state.
Secondly, experts reckon the bubble could burst.
Earlier this year Ethereum - the second biggest cryptocurrency after Bitcoin - saw its value collapse from $317 a coin to $0.1 a coin in a day. It bounced back, and is now trading at $473 a coin, but the lesson is there.
Some have labelled Bitcoins what traders call a "fool's asset". Unlike investing in a house that can be rented out or a company that makes profits, the only way to make money from them is to find a "greater fool" than you who'll pay an even higher price than you will.
Legendary investor Warren Buffett says of Bitcoin: "Stay away from it. It's a mirage, basically."
Finance expert Martin Lewis said: "Bitcoin is a highly speculative investment. Putting money in it is a form of gambling."
Read More.
What you need to know about Bitcoin.
Why else are people worried?
Because it is being exploited by criminals and hackers.
The fact that transactions are untraceable makes it a dream come true for drug dealers and money laundering, and it is the currency of choice for cyber criminals.
It is telling that online crooks who launched the massive WannaCry ransomware attack earlier this year, which crippled part of the NHS and as well as businesses in 150 countries, demanded Bitcoin payments for organisations to regain access o their systems.
The ill gotten gains can be transferred across borders and withdraw in any currency or spent them on the dark web - a collection of hard to find websites where it is impossible to track the user.
The Treasury this month announced a crackdown on Bitcoin to tackle money laundering and tax dodging.
Under the plans, online platforms where Bitcoins are traded will be required to vet customers and report suspicious activity.

[admin]

What Is Bitcoin, and How Does It Work?
If you find the concept of Bitcoin confusing, you are not alone. The virtual currency has been a constant source of controversy, but it is still not well understood.
Are Bitcoins those coins I see in photographs?
No. Those coins are novelty items that newspapers used in photographs because they couldn't find anything else to illustrate their stories about Bitcoin.
A Bitcoin is a digital token -- with no physical backing -- that can be sent electronically from one user to another, anywhere in the world. A Bitcoin can be divided out to eight decimal places, so you can send someone 0.00000001 Bitcoins. This smallest fraction of a Bitcoin -- the penny of the Bitcoin world -- is referred to as a Satoshi, after the anonymous creator of Bitcoin.
This all gets confusing, because Bitcoin is also the name of the payment network on which the Bitcoin digital tokens are stored and moved.
Unlike traditional payment networks like Visa, the Bitcoin network is not run by a single company or person. The system is run by a decentralized network of computers around the world that keep track of all Bitcoin transactions, similar to the way Wikipedia is maintained by a decentralized network of writers and editors.
The record of all Bitcoin transactions that these computers are constantly updating is known as the blockchain.
Why do criminals like Bitcoin?
Criminals have taken to Bitcoin because anyone can open a Bitcoin address and start sending and receiving Bitcoins without giving a name or identity. There is no central authority that could collect this information.
Bitcoin first took off in 2011 after drug dealers began taking payments in Bitcoin on the black-market website known as the Silk Road. Although the Silk Road was shut down in 2013, similar sites have popped up to replace it.
More recently, Bitcoin has become a method for making ransom payments -- for example, when your computer is taken over by so-called ransomware.
Why won't the government just shut it down?
The records of the Bitcoin network, including all balances and transactions, are stored on every computer helping to maintain the network -- about 9,500 computers in late 2017.
If the government made it illegal for Americans to participate in this network, the computers and people keeping the records in other countries would still be able to continue. The decentralized nature of Bitcoin is also one of the qualities that have made it popular with people who are suspicious of government authorities.
Can Bitcoin users give themselves more Bitcoins?
Anyone helping to maintain the database of all Bitcoin transactions -- the blockchain -- could change his or her own copy of the records to add more money. But if someone did that, the other computers maintaining the records would see the discrepancy, and the changes would be ignored.
Are there legal uses?
Only a small percentage of all transactions on the Bitcoin network are explicitly illegal. Most transactions are people buying and selling Bitcoins on exchanges, speculating on future prices. A whole world of high-frequency traders has sprung up around Bitcoin.
People in countries with high inflation, like Argentina and Venezuela, have bought Bitcoin with their local currency to avoid losing their savings to inflation.
One of the most popular business plans is to use Bitcoin to move money over international borders. Large international money transfers can take weeks when they go through banks, while millions of dollars of Bitcoin can be moved in minutes. So far, though, these practical applications of Bitcoin have been slow to take off.
How can I buy a Bitcoin?
There are companies in most countries that will sell you Bitcoins in exchange for the local currency. In the United States, a company called Coinbase will link to your bank account or credit card and then sell you the coins for dollars. Opening an account with Coinbase is similar to opening a traditional bank or stock brokerage account, with lots of identity verification to satisfy the authorities.
For people who do not want to reveal their identities, services like LocalBitcoins will connect people who want to meet in person to buy and sell Bitcoins for cash, generally without any verification of identity required.
Who dec >The price of Bitcoin fluctuates constantly and is determined by open-market bidding on Bitcoin exchanges, similar to the way that stock and gold prices are determined by bidding on exchanges.
What is Bitcoin mining?
Bitcoin mining refers to the process through which new Bitcoins are created and given to computers helping to maintain the network. The computers involved in Bitcoin mining are in a sort of computational race to process new transactions coming onto the network. The winner -- generally the person with the fastest computers -- gets a chunk of new Bitcoins, 12.5 of them right now. (The reward is halved every four years.)
There is generally a new winner about every 10 minutes, and there will be until there are 21 million Bitcoins in the world. At that point, no new Bitcoins will be created. This cap is expected to be reached in 2140. So far, about 16 million Bitcoin have been distributed.
Every Bitcoin in existence was created through this method and initially given to a computer helping to maintain the records. Anyone can set his or her computer to mine Bitcoin, but these days only people with specialized hardware manage to win the race.
Are there Bitcoin competitors?
Plenty. But these other virtual currencies do not have as many followers as Bitcoin, so they are not worth as much. As in the real world, a currency is worth only as much as the number of people willing to accept it for goods and services.
Who is Satoshi Nakamoto?
Bitcoin was introduced in 2008 by an unknown creator going by the name of Satoshi Nakamoto, who communicated only by email and social messaging. While several people have been identified as likely candidates to be Satoshi, as the creator is known in the world of Bitcoin, no one has been confirmed as the real Satoshi, and the search has gone on.
Satoshi created the original rules of the Bitcoin network and then released the software to the world in 2009. Satoshi largely disappeared from view two years later. Anyone can download and use the software, and Satoshi now has no more control over the network than anyone else using the software.

[admin]

What is bitcoin? Here's everything you need to know.
Blockchains, bubbles and the future of money.
It's been a wild ride.
You heard about this bitcoin thing?
Every bitcoin story must include an image of a physical bitcoin. Note: Physical bitcoin coins do not really exist.
Science Picture Co.
We're guessing: yes, you have. The first and most famous digital cryptocurrency has been racking up headlines due to a breathtaking rise in value -- cracking the $1,000 threshold for the first time on Jan. 1, 2017, topping $19,000 in December of that year and then shedding about 50 percent of its value during the first part of 2018.
But the Bitcoin story has so much more to it than just headline-grabbing pricing swings. It incorporates technology, currency, math, economics and social dynamics. It's multifaceted, highly technical and still very much evolving. This explainer is meant to clarify some of the fundamental concepts and provide answers to some basic bitcoin questions.
But first: A quick backstory.
Bitcoin was invented in 2009 by a person (or group) who called himself Satoshi Nakamoto. His stated goal was to create "a new electronic cash system" that was "completely decentralized with no server or central authority." After cultivating the concept and technology, in 2011, Nakamoto turned over the source code and domains to others in the bitcoin community, and subsequently vanished. (Check out the New Yorker's great profile of Nakamoto from 2011.)
It's actually a little more complicated than that.
What is bitcoin?
Simply put, bitcoin is a digital currency. No bills to print or coins to mint. It's decentralized -- there's no government, institution (like a bank) or other authority that controls it. Owners are anonymous; instead of using names, tax IDs, or social security numbers, bitcoin connects buyers and sellers through encryption keys. And it isn't issued from the top down like traditional currency; rather, bitcoin is "mined" by powerful computers connected to the internet.
How does one 'mine' bitcoin?
A person (or group, or company) mines bitcoin by doing a combination of advanced math and record-keeping. Here's how it works. When someone sends a bitcoin to someone else, the network records that transaction, and all of the others made over a certain period of time, in a "block." Computers running special software -- the "miners" -- inscribe these transactions in a gigantic digital ledger. These blocks are known, collectively, as the "blockchain" -- an eternal, openly accessible record of all the transactions that have ever been made.
Using specialized software and increasingly powerful (and energy-intensive) hardware, miners convert these blocks into sequences of code, known as a "hash." This is somewhat more dramatic than it sounds; producing a hash requires serious computational power, and thousands of miners compete simultaneously to do it. It's like thousands of chefs feverishly racing to prepare a new, extremely complicated dish -- and only the first one to serve up a perfect version of it ends up getting paid.
When a new hash is generated, it's placed at the end of the blockchain, which is then publicly updated and propagated. For his or her trouble, the miner currently gets 12.5 bitcoins -- which, in February 2018, is worth roughly $100,000. Note that the amount of awarded bitcoins decreases over time.
What determines the value of a bitcoin?
Ultimately, the value of a bitcoin is determined by what people will pay for it. In this way, there's a similarity to how stocks are priced.
The protocol established by Satoshi Nakamoto dictates that only 21 million bitcoins can ever be mined -- about 12 million have been mined so far -- so there is a limited supply, like with gold and other precious metals, but no real intrinsic value. (There are numerous mathematical and economic theories about why Nakamoto chose the number 21 million.) This makes bitcoin different from stocks, which usually have some relationship to a company's actual or potential earnings.
No, they're not bitcoins. They're pistachios.
Pistachios/YouTube screenshot by CNET.
Without a government or central authority at the helm, controlling supply, "value" is totally open to interpretation. This process of "price discovery," the primary driver of volatility in bitcoin's price, also invites speculation (don't mortgage your house to buy bitcoin) and manipulation (hence the recent talk of tulips and bubbles).
Bitcoin has made Satoshi Nakamoto a billionaire many times over, at least on paper. It's minted plenty of millionaires among the technological pioneers, investors and early bitcoin miners. The Winklevoss twins, who parlayed a $65 million Facebook payout into a venture capital fund that made early investments in bitcoin , are now billionaires according to Fortune.
How do I buy bitcoin?
If you're willing to assume the risk associated with owning bitcoin, there is an increasing number of digital currency exchanges like Coinmama, CEX, Kraken and Coinbase -- the largest and most established of them -- where you can buy, sell and store bitcoins.
Getting started is about as complicated as setting up a Paypal account. With Coinbase, for example, you can use your bank (or Paypal account) to make a deposit into a virtual wallet, of which there are many to choose from. Once your account is funded, which usually takes a few days, you can then exchange traditional currency for bitcoin.
What can I do with bitcoin?
You can use bitcoin to buy things from more than 100,000 merchants, though still few major ones. You can sell it. Or you can just hang on to it. Note that there are no inherent transaction fees with bitcoin, although exchanges like Coinbase typically charge a fee when you buy or sell.
Is all of this legal?
The former Silk Road homepage.
Short, qualified answer: Yes, for now, as long as -- like any currency -- you don't do illegal things with it. For instance, bitcoin was the sole currency accepted on Silk Road, the Dark Web marketplace for drugs and other illicit goods and services that was shuttered by the FBI in 2013 .
Since then, bitcoin has largely evaded regulation and law enforcement in the US, although it's under increased scrutiny as it attracts more mainstream attention. Though it's legal to buy and sell bitcoin, miners and exchanges occupy a gray area that could be vulnerable to future regulation and/or law enforcement action.
What are the risks?
Legal and regulatory hazards as >Exhibit A: December 2017. )
Bitcoin transactions cannot be traced back indiv >public and private encryption keys . This anonymity can be appealing, especially with companies and marketers increasingly tracking our every purchase, but it also comes with drawbacks. You can never be certain who is selling you bitcoin or buying them from you. Opportunities for money laundering abound; in 2016, authorities in the Netherlands arrested 10 men for just this.
Theft is also a risk. The bitcoin subreddit is rife with indiv >"lost" 750,000 of its customers' bitcoins in 2014 and hackers took $60 million from NiceHash in December 2017. There are few avenues for pursuing refunds, challenging a transaction or recovering such losses. Once a transaction hits the blockchain, it's final.
Coinbase has been tested by a massive rise in interest in bitcoin.
OK, so what about --- wait, there are more risks?
Because bitcoin is so new and decentralized, there is plenty of murkiness and many unknowns. Even the technical rules for mining are still evolving and up for debate.
The IRS views bitcoins as property, not currency. There are tax implications and a federal judge recently ruled that Coinbase must surrender records to the IRS on transactions of $20,000 or more.
Then there's the fundamental question of whether you should trust a particular exchange. Even Coinbase, the most established of them all has struggled to keep up with demand, plagued by site outages, scaling issues and customer service complaints. Even if it's venture-backed, every bitcoin player today is by definition a startup and comes with all of the associated risks.
Now I sort of understand bitcoin. WTF is Bitcoin Cash?
In August 2017, different sects within the bitcoin mining community had a disagreement about the rules governing the mining process -- specifically, what constitutes the appropriate size (in megabytes) of a block. Unable to form a consensus, there was a fork in the blockchain , with the bitcoin originalists going one way and the group favoring larger blocks going another to start Bitcoin Cash.
Though they share a common digital ancestry, each now has its own individual blockchain with slightly different protocols. (For what it's worth, bitcoin miners are sticking with 1MB blocks, Bitcoin Cash uses 8MB blocks.) Forking is almost assured to happen again in the future.
Are there other cryptocurrencies?
Yes. More than a thousand, with more sprouting up every day. As >in this explainer .
Buying and selling bitcoin : A quick and dirty introduction to trading cryptocurrency.

[admin]

What Is Bitcoin? Guide for the Most Popular Cryptocurrency.
You've probably heard the word by now but you might still be wondering -- what is Bitcoin? Well, there are no stupid questions here, so let's start at the very b