Crypto currency is a digital or virtual form of currency that uses cryptography for secure financial transactions, control the creation of new units, and to verify the transfer of assets. Unlike traditional currencies issued by governments, crypto currencies operate on decentralized technology called blockchain which makes them secure and transparent. Popular examples of crypto currencies include Bitcoin, Ethereum, Ripple, and Litecoin. People can buy, sell, or trade crypto currencies on online platforms called exchanges. Investing in crypto currency has gained popularity due to the potential for high returns, but it also carries risks due to market volatility and security concerns.