It will never become a stable coin in my opinion.
Bitcoin is so much volatile, that's clear. It's still in the developing process, lots of regulation already implement over it and there many rules and regulation would be proceed. I think things are changing rapidly and to state future performance of bitcoin still early.
It is because of the volatility that many businesses especially the mainstream online business class are not using bitcoin as a mode of payment. A time will come when that is going to happen but it will not happen if this volatility continues. Bitcoin should be stable for the society to adopt it in their day to day financial transactions.