$BTC Bitcoin, often symbolized as $BTC, is a decentralized digital currency that was created in 2009 by an individual or group using the pseudonym Satoshi Nakamoto. It operates without a central authority or banks, and transactions are verified by network nodes through cryptography and recorded in a public ledger known as a blockchain. As the first cryptocurrency, Bitcoin laid the foundation for the many digital currencies that followed, and it continues to be a significant player in the financial and technological sectors.