Bitcoin, as the leading cryptocurrency, has recently sparked renewed enthusiasm due to the halving effect and institutional entry. Its total supply of 21 million coins, combined with global inflationary pressures, has pushed the price to briefly exceed $70,000. Asset management giants like BlackRock have launched Bitcoin ETFs, attracting over $30 billion in inflows, as traditional finance accelerates its embrace of digital assets. The Layer 2 Lightning Network expands and speeds up transaction efficiency, while El Salvador has recognized Bitcoin as legal tender, showcasing its potential for sovereign applications. Despite significant volatility, Bitcoin continues to challenge gold's status with its decentralized characteristics and censorship-resistant advantages, emerging as a new option for "store of value" in the digital age, and may reshape global financial infrastructure in the future.