Bitcoin (BTC) is a decentralized digital currency, often referred to as cryptocurrency, created in 2009 by an unknown person or group of people using the pseudonym Satoshi Nakamoto. It operates on a peer-to-peer network without the need for intermediaries like banks. BTC transactions are recorded on a public ledger called the blockchain, ensuring transparency and security. Unlike traditional currencies, Bitcoin is not controlled by any government or financial institution, making it immune to inflation and censorship. Users can buy, sell, and exchange BTC anonymously, making it a popular choice for both investment and transactions in the digital economy.