Cryptocurrency is reshaping the global financial landscape. As a decentralized digital asset based on blockchain technology, it breaks the boundaries of traditional monetary systems and enables peer-to-peer instant transactions. From Bitcoin's store of value properties to Ethereum's smart contract ecosystem, cryptocurrencies have evolved from geek toys to indispensable financial infrastructure. Despite volatile prices and ongoing regulatory development, the trust revolution brought by underlying technology is driving innovation in areas such as cross-border payments and digital identity. In the future, cryptocurrencies may deeply integrate with traditional finance and become a key value carrier in the digital economy era.