There are the following: 1. The concept of Bitcoin was first put forward by Satoshi Nakamoto in 2009. It is a P2P digital currency. Bitcoin is generated by a large number of calculations according to a specific algorithm. Bitcoin economy uses the distributed database composed of many nodes in the whole P2P network to confirm and record all transaction behaviors, and uses cryptography design to ensure the security of all links in currency circulation.

2. Litecoin is a kind of online currency based on "peer-to-peer" technology, which can help users pay anyone in the world instantly.

At present, it is the second largest virtual currency after the global circulation market value of Bitcoin.

3.E-DINARCOIN is a completely decentralized payment system based on open blockchain computing technology. The decentralized cryptocurrency used in the payment system is called e-dinarcoin.