#XXX Points Post

Cryptocurrency is a decentralized digital currency based on blockchain technology, ensuring transaction security through encryption algorithms. Bitcoin (launched in 2009) is the earliest cryptocurrency, and other currencies like Ethereum are also widely used. They do not require a central authority, relying on a distributed network to verify transactions recorded on an immutable public ledger. Major characteristics include fast, low-cost global transfers, but there are significant price fluctuations, high energy consumption, and potential use for illegal activities. As of 2025, the global cryptocurrency market value is approximately $3 trillion, with Bitcoin being dominant. Investment should be approached with caution, choosing trustworthy exchanges and wallets, and being aware of security and regulatory risks.