Maybe I'm wrong or too optimistic about Bitcoin, but I believe the only thing that can physically stop Bitcoin is a blackout electricity. If suddenly electricity goes away foever, we won't be able to mine/use Bitcoin.
It would have made sense if you would have said that electricity would go off temporarily.
Electricity will never go off forever unless there is some new type of energy the drives the world and that won't be happening in next few generations at all.
So basically there's no stopping to bitcoin. It will probably stay here for the long run.