Bitcoin is both a cryptocurrency and an electronic payment system. Based on Blockchain. It is the first application of Blockchain.
There are more Blockchain technologies like Bitcoin: Ethereum, Hyperledger, Ripple, Zcash (altcoins).
Category: Cryptocurrencies
A cryptocurrency (or crypto currency) is a digital asset designed to work as a medium of exchange that uses cryptography to secure its transactions, to control the creation of additional units, and to verify the transfer of assets.
IOTA
IOTA, a cryptocurrency for the Internet-of-Things (IoT) industry. The main feature of this novel cryptocurrency is the tangle, a directed acyclic graph (DAG) for storing transactions. The tangle naturally succeeds the blockchain (not a blockchain coin) as its next evolutionary step, and off ers features that are required to establish a machine-to-machine micropayment system.