The main risk is USDD being unsuccesfull and lose its peg to 1$, very unlikely but possible, another one is a hack or you investing in liquidity farming and have impermanet loss, I think the best bet is to wait until the 15th of May and lend your USDD for a stable 30% APY on Justlend, the risk of losing its peg is still there but there are less risks.
Best Regards,
Cryptopeach