Crypto currency is a digital or virtual currency that is secured by cryptography, which makes it nearly impossible to counterfeit or double-spend. Crypto currency is a form of digital money that is designed to be secure and anonymous. It is a decentralized form of currency, meaning it is not controlled by any government or central bank. Crypto currency is created through a process called mining, which involves using powerful computers to solve complex mathematical equations. The most popular crypto currency is Bitcoin, but there are many other types of crypto currency, such as Ethereum, Litecoin, and Ripple. Crypto currency can be used to purchase goods and services online, and it can also be used as an investment.