$BTC Bitcoin ($BTC) remains one of the most influential innovations in the digital finance world. Introduced in 2009 by the pseudonymous Satoshi Nakamoto, Bitcoin operates on a decentralized network using blockchain technology, which ensures transparency, security, and immutability of transactions. Unlike traditional fiat currencies, Bitcoin is not controlled by any central authority or government, giving users full control over their assets. Its limited supply—capped at 21 million coins—adds a deflationary nature, often likened to digital gold.