How Relevant is Justin Sun?

Justin Sun has recently announced an algorithmic stablecoin, USDD, with 30% yield. Sun has announced plans to backstop USDD with $10B of crypto as collateral, matching the Luna Foundation Guard (LFG). Do a deep dive, conduct research, and provide a well-researched conclusion to the burning questions: is Justin Sun for real? Is USDD likely to accrue significant backing? How will its 30% offering fare over time?