$BTC (Bitcoin) is the first and most well-known cryptocurrency, created in 2009 by an entity under the pseudonym Satoshi Nakamoto. It operates on a decentralized network called blockchain, ensuring transparent and secure transactions without the need for intermediaries such as banks. Its supply is limited to 21 million coins, reinforcing its deflationary nature. BTC has experienced significant volatility in its value, attracting both investors and speculators. It has generated a global debate about its regulation and acceptance as a legitimate currency. Furthermore, Bitcoin has inspired the creation of thousands of alternative cryptocurrencies and blockchain-based applications.