USDD is a cryptocurrency issued by the TRON DAO Reserve with a stable price and diverse use cases. It will have a built-in incentive mechanism and a responsive monetary policy, which will allow USDD to self-stabilize against any price fluctuations, and help consolidate the value of USDD as a true settlement currency. Also, a decentralized currency protocol with a stable price will expand use cases for cryptocurrency, making it truly accessible with far-reaching implications for the blockchain space and the real economy.