Why hold USDT instead of USD?

Why should we consider holding USDT instead of traditional USD? Could you elaborate on the advantages of USDT over USD? What are the key benefits that make USDT a more attractive option for investors and traders? How does USDT's stability compare to USD, and what mechanisms does it use to maintain this stability? Also, how does USDT's integration into the cryptocurrency ecosystem enhance its utility and convenience? Could you provide some examples of scenarios where holding USDT might be more beneficial than holding USD?