Tether and other stable coin in cryptocurrency have been the lifeline for many investors and market for stability. Cryptocurrency fiat is good for the market and I don't see issues with tether, they only need to sort out the dollar backing issue!
I do not think Tether will collapse because it is a kind of coin that is priced at par with USD for easier trading in the cryptocurrency market. Although that is very simple but Tether has been in this market for a long time and let it disappear is difficult because of the large number of people hold.