Bitcoin is the first decentralized digital currency, created in 2009 by an unknown person using the pseudonym Satoshi Nakamoto. It operates on a technology called blockchain, which is a public ledger of all transactions that have ever been executed. Bitcoin has gained popularity as a new form of money and investment.

Bitcoin's decentralized nature and blockchain technology have revolutionized the concept of currency. Its popularity as both a medium of exchange and an investment continues to grow, shaping the future of finance.