Cryptocurrency, often referred to as "crypto," is a type of digital or virtual currency that uses cryptography for security. Unlike traditional currencies issued by governments, cryptocurrencies operate on decentralized networks based on blockchain technology. This means that transactions are recorded on a public ledger, making them transparent and secure. Bitcoin, the first and most well-known cryptocurrency, was created in 2009 by an anonymous person or group known as Satoshi Nakamoto. Since then, thousands of other cryptocurrencies, such as Ethereum and Litecoin, have emerged, each with unique features and purposes. Crypto can be used for various transactions, investments, and even as a means of transferring value across borders.