$BTC Bitcoin (BTC) is a decentralized cryptocurrency created in 2009 by a person or group under the pseudonym Satoshi Nakamoto. It uses blockchain technology to record all transactions in a public and immutable ledger. Unlike traditional currencies, it is not controlled by any government or financial institution. Bitcoins are obtained through a process called mining, which involves solving complex mathematical problems. Its supply is limited to 21 million units, which reinforces its scarcity. Bitcoin is used as a medium of exchange, store of value, and, in some cases, as a speculative asset in financial markets.