All About Bitcoin.
Bitcoin Bitcoin Logo of the bitcoin reference client Administration decentralized Date of introduction 3 January 2009 ; 5 years ago User(s) worldwide Supply growth 25 bitcoins per block (approximately every ten minutes) until mid 2016, [ 2 ] and then afterwards 12.5 bitcoins per block for 4 years until next halving. This halving continues until 2110-2140 when 21 million bitcoins have been issued. Subunit 10 −3 millibitcoin 10 −6 microbitcoin, bits [ 3 ] 10 −8 satoshi [ 4 ] Symbol BTC, [ note 2 ] XBT, [ note 3 ] [ note 4 ] millibitcoin mBTC microbitcoin, bits [ 3 ] μBTC Coins unspent outputs of transactions denominated in any multiple of satoshis [ 11 ] Bitcoin is a payment system invented by Satoshi Nakamoto [ note 5 ] in 2008 [ 12 ] and introduced as open-source software in 2009. [ 13 ] The system is peer-to-peer , all nodes verifying transactions in a publ...