At first, it was used for transfers, but later it was found that you could also earn yields. Recently, more and more people around me are talking about USDD.

The reasons are actually not complicated:
✅ Cross-chain circulation is convenient, making fund usage more flexible
✅ High transfer efficiency, smooth on-chain experience
✅ Usable in multiple scenarios, ecosystem coverage is expanding
✅ Yield mechanisms are continuously optimized, providing a good holding experience
✅ Relying on the TRON ecosystem, stability and liquidity are both guaranteed