Which country is using USDT?

Which country, exactly, is utilizing the cryptocurrency known as USDT? Has it gained widespread acceptance in a particular region, or is it being used globally? Are there any specific regulations or policies in place that govern the use of USDT in this country? Is it being used primarily for transactions, investments, or both? Furthermore, what are the main industries or sectors that are adopting USDT in this country? And finally, how does the use of USDT in this country compare to its adoption in other parts of the world?