$BTC Bitcoin (BTC) is the first and largest digital cryptocurrency, functioning as decentralized internet money. It allows you to send and receive funds globally without relying on banks, governments, or other middlemen.How it WorksInstead of physical bills or coins, Bitcoin is entirely virtual. It relies on cryptography and a shared digital ledger called the blockchain. Every transaction is verified by a worldwide network of computers, making it incredibly secure, transparent, and permanent.