Cryptocurrencies are a worldwide digital payment system with market values similar to other currencies. It is an alternative currency transferred only in digital form. The cryptocurrency exploits blockchain technology to record transaction-related information. Some examples of cryptocurrencies using blockchain-based technologies are Ethereum and bitcoin. The cryptocurrency models utilize blockchain ledgers to store the transaction records in a decentralized manner. The investors and miners can view the transactions using appropriate authorization and authentication. The miners can access cryptocurrencies through mobile wallets. In recent years, cryptocurrency and blockchain have been referred to using similar sentences but are linked to each other.Some of the publicly available cryptocurrencies are described as follows.