Is it safe to hold USDT?

I've been hearing a lot about USDT lately, and I'm curious about its safety. As a professional in the field of cryptocurrency and finance, what's your take on holding USDT? Is it a secure investment, or are there any risks I should be aware of? I understand that it's a stablecoin pegged to the US dollar, but how does it actually work, and how is its value maintained? Also, are there any regulatory issues or concerns related to USDT that I should be aware of? Thank you for your time and expertise.