Is USDT safe long term?

I've been hearing a lot about USDT and its use in the crypto world. Could you please shed some light on whether investing in USDT is safe for the long term? I'm aware that it's supposed to be a stablecoin, but with the volatile nature of cryptocurrencies, I'm a bit apprehensive. Could you elaborate on the factors that could potentially affect its stability in the future? Also, what are the potential risks involved in holding USDT for a prolonged period? I'd appreciate it if you could provide a balanced perspective on this matter. Thank you.