Before revision: This article changes a lot of the original Bitcoin system, including, fast currency distribution within 1 year by utilizing buyer's different characters, removing bloated history transactions from data synchronization, no mining, no blockchain, it's environmentally friendly, no checkpoint,  it's purely decentralized and purely based on proof of stake.
After revision: In this paper we propose a new framework of cryptocurrency system. The major parts what we have changed include removing the bloated history transactions from data synchronization, no mining, no blockchain, it's environmentally friendly, no checkpoint, it's purely decentralized and purely based on proof of stake.