Bitcoin 11 plaque

Bitcoin is a cryptocurrency and worldwide payment system.It is the first decentralised digital currency, as the system works without a central bank or single administrator.The network is peer-to-peer and transactions take place between users directly through the use of cryptography, without an intermediary.These transactions are verified by network nodes and recorded in an immutable public distributed ledger called a blockchain. Bitcoin was invented by an unknown person or group of people under the name Satoshi Nakamoto and released as open-source software in 2009.