USD coin is a flat collateralized stablecoin that is pegged 1:1 with USD. It is in the rank of USDT, TUSD and others. It came into crypto currency world in September 2018 hence it to s a relatively new project brought about by Centre consortium, Circle and coinbase.
Coin USD is an erc-20 token on ethereum network and so can be held on all ethereum based wallet like myeherwallet and metamask. The coin can also be exchanged directly for USD on coinbase. What a simple way to store the value of ones USD without the fair of inflation. Once in USD coin the value of the USD will remain balance for life.
Another good spot about this project is that it is transparent unlike some stablecoin that has what I will refer to as relaxed regulations, USD coin is fully regulated and transparent. As a matter of fact, it must work with regulated financial institution in other to maintain full reserve of the equivalent flat currency.