USDD is a decentralized stablecoin launched by Justin Sun himself. It is issued and managed by Tron DAO Reserve, and the operating mechanism is also designed by him. In order to ensure that USDD does not lose its anchor with the US dollar, Justin Sun directly controls the most critical assets in the collateral pool - large reserves such as TRX, USDT, and Bitcoin. Whenever the market fluctuates and the peg is in jeopardy, he has repeatedly used his own funds and reserve positions to inject capital to maintain stability. He can be said to be the "behind-the-scenes controller" of USDD. As of the latest data, the on-chain market value of USDD is approximately US$432 million, and the stablecoin market value ranking is about 10th.