Cryptocurrency is a digital or virtual currency that uses cryptography to secure and verify transactions and to control the creation of new units. Unlike traditional currencies, such as the US dollar or Euro, cryptocurrencies operate independently of a central bank and are decentralized. Cryptocurrencies were first introduced in 2009 with the creation of Bitcoin by an unknown person or group of people using the pseudonym Satoshi Nakamoto. Since then, thousands of different cryptocurrencies ha...