Cryptocurrency is decentralized digital money, based on blockchain technology. These currencies are owned by an entity that owns the key that lets it create a new entry in the ledger.
Genesis of all the cryptocurrency came from Bitcoin. Bitcoin was the first crypto currency developed by pseudonymous computer programmer “Satoshi Nakamoto”. According to Investopedia, “A cryptocurrency is a digital or virtual currency that is secured by cryptography, which makes it nearly impossible to counterfeit or double-spend. Many cryptocurrencies are decentralized networks based on blockchain technology—a distributed ledger enforced by a disparate network of computers. A defining feature of cryptocurrencies is that they are generally not issued by any Central authority, rendering them theoretically immune to government interference or manipulation”.