Cryptocurrency, a digital currency secured by cryptography, operates on decentralized networks, enabling transactions without traditional intermediaries like banks. Key cryptocurrencies such as Bitcoin and Ethereum are highlighted, with Bitcoin's value projected to reach between $150,000 and $200,000 by 2025. Blockchain technology, which ensures transparency and security, is fundamental to crypto operations. The article also emphasizes the importance of public and private keys for transaction security and the role of crypto wallets in managing digital assets. By 2025, 28% of American adults are expected to own cryptocurrency, underscoring the importance of understanding these concepts for participating in the digital financial revolution.