In my humble estimation stablecoins are so useful for everyone, that is why if there is some crisis like Corona, stable coins can save your money from the crisis. l mean if you realize that there is some problem, you can convert your money to stable coins and just can relax. 
It will save you thousands of dollars. But it doesn't mean stablecoins will be the future of cryptocurrency.
It will save you thousands of dollars. But it doesn't mean stablecoins will be the future of cryptocurrency.This is somehow true but you need to know that these stable coins might collapse anytime.
What if the owners of this stable coin decided to sell off their coins?
And how sure are you that they are still back 100% by the fiat currency that they are supporting at any given time?
You still have to be careful dealing with stablecoins, because we don't know the truth behind their existence.