$BTC

Bitcoin (BTC) is a decentralized digital currency that enables peer-to-peer financial transactions without intermediaries like banks. It was created in 2009 by Satoshi Nakamoto. Bitcoin uses cryptography for secure transactions and controls the creation of new units. Transactions are recorded on a public ledger called the blockchain. Bitcoin is limited to 21 million units, making it a scarce asset. It's considered a store of value and a medium of exchange, with a growing global adoption.