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Bitcoin uses peer-to-peer technology to function with no central authority or banks; managing transactions and the issuing of bitcoins is performed collectively by the network. Bitcoin is open-source; its design is public, nobody owns or controls Bitcoin and everyone can participate. Through many of its unique properties, Bitcoin enables exciting uses that could not be covered by any preceding payment method. .
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Bitcoin () is a cryptocurrency, a kind of electronic cash. It is a decentralized digital currency without a central bank or single administrator which can be sent from user-to-user on the peer-to-peer bitcoin network without the need for intermediaries.7
Transactions are confirmed by network nodes via cryptography and listed in a public dispersed ledger called a blockchain. Bitcoin was invented by an unknown person or group of individuals using the name Satoshi Nakamoto9 and released as open-source software in 2009.10 Bitcoins are created as a reward for a process known as mining.
Research produced by the University of Cambridge estimates that in 2017, there were 2.9 to 5.8 million unique users using a cryptocurrency wallet, the majority of them using bitcoin.12.
Bitcoin has been criticized for its use in illegal transactions, its own high electricity consumption, cost volatility, thefts from exchanges, and also the chance that bitcoin is an economic bubble.13 Bitcoin has also been used as an investment, although several regulatory agencies have issued investor alerts about bitcoin.14
The domain name"bitcoin.org" was registered on 18 August 2008.15 On 31 October 2008, a link to a paper authored by Satoshi Nakamoto titled Bitcoin: A Peer-to-Peer Electronic Cash System5 was posted to some cryptography mailing list.16 Nakamoto implemented the bitcoin software as open-source code and published it in January 2009.171810 Nakamoto's identity remains unknown.9.
In January 2009, the bitcoin network was made when Nakamoto mined the very first block of the chain, known as the genesis block.1920 Embedded in the coinbase of the cube was the following text:"The Times 03/Jan/2009 Chancellor on brink of second bailout for banks. "10 This note has been interpreted as both a timestamp and a comment on the instability brought on by fractional-reserve banking.21:18.
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The recipient of the first bitcoin transaction was cypherpunk Hal Finney, who made the first reusable proof-of-work system (RPOW) in 2004.22 Finney downloaded the bitcoin software on its launch date, and on 12 January 2009 obtained ten wikipedia reference bitcoins from Nakamoto.2324 Other early cypherpunk supporters were founders of bitcoin predecessors: Wei Dai, founder of b-money, and Nick Szabo, creator of bit gold.25 In 2010, the earliest known commercial transaction using bitcoin occurred when programmer Laszlo Hanyecz bought two Papa John's pizzas for 10,000 bitcoin.26.
Nakamoto is estimated to have mined one million bitcoins27 before disappearing in 2010, when he handed the network awake crucial and control of this code over to Gavin Andresen. Andresen later became lead programmer at the Bitcoin Foundation.2829 Andresen then sought to decentralize control. This abandoned opportunity for controversy to develop over the future development path of bitcoin.3029.
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After ancient"proof-of-concept" transactions, the first major users of bitcoin were black markets, for example Silk Road. During its 30 months of existence, beginning in February 2011, Silk Road exclusively accepted bitcoins as payment, transacting 9.9 million in bitcoins, value roughly $214 million.31:222
In 2011, the price started at $0.30 each bitcoin, growing to $5.27 for the year. The price rose to $31.50 on 8 June. Within a month that the price fell to $11.00. The next month it dropped to $7.80, and in another month to $4.77.32
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Litecoin, an early bitcoin spin-off or altcoin, appeared in October 2011.33 Many altcoins have been created since then.34
In March 2013 the blockchain briefly split into two independent chains with different rules. The two blockchains operated simultaneously for half an hour, each with its own version of the transaction history. Normal operation was restored when the majority of the network downgraded to version 0.7 of their bitcoin software.37 The Mt.
Gox experienced processing delays because of insufficient capacity44 resulting in the bitcoin learn this here now price dropping from $266 to $76 prior to returning to $160 from this source within six hours.45 The bitcoin price rose to $259 on 10 April, but then crashed by 83% to $45 over the next three times.35 On 15 May 2013, US government captured accounts connected with Mt.