I used to keep USDT in my spot account without any returns, feeling it was a waste. Later, I saw that Gate launched GUSD, which claimed to automatically earn interest when exchanged, so I decided to give it a try. To my surprise, I really do receive interest in my account every day, although it's not much, it adds up over time. The key point is that there is no lock-up position at all, and I can easily exchange it back to USDT whenever I want, which doesn't delay trading at all. I have now converted most of my idle funds into GUSD, since it's just sitting there, I might as well let it earn some interest.