Bitcoin (BTC), introduced in 2009 by the pseudonymous Satoshi Nakamoto, stands as the bedrock of the cryptocurrency world. As of March 22, 2025, its market dominance endures, fueled by a capped supply of 21 million coins and its reputation as "digital gold." Powered by Proof-of-Work (PoW), Bitcoin’s blockchain offers unparalleled security and decentralization, attracting institutional players like MicroStrategy, with its massive BTC holdings, and nations like El Salvador, where it’s legal tender. In 2025, Bitcoin’s price often spikes during economic uncertainty, reinforcing its role as a hedge against inflation. The upcoming 2028 halving, which will further reduce mining rewards, already stirs excitement for another potential bull run. Critics point to its energy-intensive mining and limited utility beyond investment, but Bitcoin’s simplicity—pure, scarce digital value—remains its strength. For millions globally, BTC is more than a currency; it’s a symbol of financial autonomy and a testament to blockchain’s disruptive power.