Is it safe to leave money in USDT?

I've been hearing a lot about USDT lately, and I'm considering investing some of my savings in it. But before I do, I want to make sure it's a safe option. Can you tell me, is it safe to leave money in USDT? I've heard some concerns about its stability and whether it's backed by real dollars. What are your thoughts on this? Also, are there any risks I should be aware of before investing in USDT? I appreciate your expertise in this field and would really value your advice.