Bitcoin

Bitcoin is a decentralized cryptocurrency that uses cryptography to verify transactions and record them in a public ledger called a blockchain. It was invented by Satoshi Nakamoto in 2008 and its use began in 2009. Bitcoin operates on a proof of work system, where miners solve complex computational puzzles to secure the blockchain and verify transactions, and is mostly seen as an investment, but its use by criminals has led to its ban by several countries.learn more on wikipedia