$BTC O Bitcoin (BTC) is the first decentralized cryptocurrency, created in 2009 by a person or group under the pseudonym Satoshi Nakamoto. Based on blockchain technology, Bitcoin enables digital transactions without the need for intermediaries, such as banks. Its supply is limited to 21 million units, which contributes to its appreciation over time. Considered a store of value by many, BTC is used both as an investment and as a means of payment. Its volatility, however, requires caution. Bitcoin has profoundly influenced the global financial system and driven the development of other cryptocurrencies.