Cryptocurrency is a digital or virtual form of currency that uses cryptography for security. Unlike traditional currencies issued by governments, cryptocurrencies operate on decentralized networks based on blockchain technology—a distributed ledger enforced by a network of computers (nodes). Bitcoin, launched in 2009, was the first cryptocurrency and remains the most well-known. Since then, thousands of other cryptocurrencies have emerged, including Ethereum, Ripple, and Litecoin. These digital assets can be used for online purchases, investment, or transferring funds globally without intermediaries. While cryptocurrency offers advantages like lower transaction costs and greater privacy, it also poses risks such as volatility, regulatory uncertainty, and potential for misuse in illegal activities. Despite this, interest continues to grow.