I think this fact will happen in this year. After Trump 's inauguration , Bitcoin price is rising up higher and it's quite closer to 1,000$ price. it seems the world economy is ready for new crisis when USD is down badly with Trump's decision and it has effected to bitcoin price immediately.
what you are saying is highly speculative. and i have been hearing it for many years about USD value dropping and failing economy of US, and i am not saying it is never going to happen but i have never seen any valid argument and it has not yet happened.
and besides bitcoin price goes up and is better to go up with adoption not just because somewhere in the world economy is shit and more people want out with new investments. that just makes price more volatile.