Cryptocurrency is a digital or virtual form of currency that uses cryptography for security and operates independently of a central bank. It is decentralized and typically utilizes blockchain technology to maintain a secure and transparent transaction ledger. Cryptocurrencies like Bitcoin, Ethereum, and Litecoin have gained popularity in recent years as alternative forms of payment and investment. The technology behind cryptocurrencies has the potential to revolutionize the financial industry by offering faster, cheaper, and more secure transactions. However, it also comes with challenges such as regulatory concerns, security risks, and volatility in market value.