The most stable coin ,have the possibility of collapse?
This question Troubled me for long time,Thanks for answer

Yes.
What are the reasons to think so? I saw people writing that tether is not used as much as it seems to be used or something like that, but is not this coin the safest one among cryptocurrencies, since it is regulated and backed up by dollar? I guess this coin can't make one earn profit as well as lose anything. It is just kind of an electronic version of dollar which works like a cryptocurrency. I can understand why people hate it ideologically, but I don't see it possessing any real threat.
I didn't understand it too. In what situations could Tether colapses? It's a stable currency, always following Dollar's price, good to move your trading profits into this to avoid fluctuations and losses. Do people here mean there isn't any guarantee Tether will keep following Dollar's price and may fail like a scam or it will colapse only if Dollar colapse as well?
The most common fear is not that tether is going to fall if the dollar falls, the fear is tether will be just one more scam, think about it this way, almost any coin which have assured us it was backed by something turned out to be a scam, not only that, how many business claim to have a set of assets only to become a scam and defraud their investors? This is why people do not trust in tether.