In my view bitcoin as a decentralised digital currency has no direct governance over it. So in order for it to stop it has to mean that no one is using and trading, which is almost near impossible.
Exactly, there is no point of Bitcoin too be vanished all of sudden or slow n steadily. Too many people like and companies depends on bitcoins and it is the new thing for the world which is to be how the future financial transactions will be in pure digital way and fiat will be no more.
For me bitcoin will rule the world by the year 2020.