#ActiveUserImpact Cryptocurrency is a digital or virtual form of money that uses cryptography for security. Unlike traditional currencies issued by governments, cryptocurrencies operate on decentralized systems called blockchains, which are distributed ledgers maintained by a network of computers. Bitcoin, launched in 2009, was the first cryptocurrency and remains the most well-known. Others, like Ethereum, offer additional features such as smart contracts. Cryptocurrencies enable peer-to-peer transactions without intermediaries like banks, offering faster, borderless payments. However, they are volatile and face regulatory scrutiny due to concerns over security, fraud, and environmental impact. Despite challenges, cryptocurrencies are reshaping finance and technology worldwide.