Bitcoin (BTC), created by Satoshi Nakamoto in 2009, is the first decentralized cryptocurrency based on blockchain technology, with a total supply of 21 million coins, approximately halving every four years. Initially viewed as digital gold and a symbol of liberalism, its price has been highly volatile, reaching $20,000 in 2017 and breaking $60,000 in 2021, with an estimated $100,000 in early 2025. BTC is not controlled by any central authority, and transactions are transparent and immutable, attracting investors and technology enthusiasts. However, it faces challenges such as high energy consumption, slow transaction speeds, and regulatory pressures. Policies like China's ban and the U.S. reserve highlight its changing status. In the future, BTC may evolve between financial innovation and compliance, with potential applications expanding to payments and asset reserves.