#BTCvsMarkets Bitcoin is a digital currency that operates through blockchain technology. It is decentralized, meaning no central bank or government controls it. It was launched in 2009 by an individual or group using the pseudonym Satoshi Nakamoto. Bitcoin uses cryptography to keep transactions safe and transparent. It is considered a popular investment medium in the current economic system. The number of Bitcoins is limited (21 million), which causes fluctuations in its price.