#BTC is a decentralized cryptocurrency, introduced in 2008 by Satoshi Nakamoto. It operates on a peer-to-peer network, without a central authority, using blockchain technology to record transactions. Transactions are validated through mining, a process that consumes energy but ensures security and prevents double spending. Bitcoin is pseudonymous, attractive for investments, but also criticized as speculative or used in illegal activities. In 2021, El Salvador adopted it as legal tender. The price of BTC recently reached 100,000 USD, with predictions of growth to 1 million USD by 2028, according to some analysts.