$BTC Bitcoin (BTC) is a decentralized digital currency introduced in 2009 by an unknown person or group using the pseudonym Satoshi Nakamoto. It operates on a peer-to-peer network, allowing users to send and receive funds without relying on intermediaries like banks. Transactions are verified by network nodes through cryptography and recorded on a public ledger called the blockchain. Bitcoin has a fixed supply of 21 million coins, making it scarce and deflationary by design. It is often seen as a hedge against inflation and a store of value. Bitcoin is traded on various cryptocurrency exchanges and is accepted by some businesses worldwide.