The Dai Stablecoin is set at the value of one US Dollar, built on Ethereum and developed by MakerDao team, can be created through depositing Ether into contract-smart and therefore always fully guaranteed. The requirements for stablecoin that allow low risk arbitration between different cryptocurrency exchanges.
I wonder what will be the demand for stable coins of various similar campaigns after most states issue their national stable digital currencies. I think that after this, stable coins of various commercial campaigns will not have a high level of demand, since they will lose to stable coins of states. Confidence in stable state coins should be much higher, because the risk of bankruptcy of commercial campaigns is much higher than any state.