Given the events in Afghanistan over the last week, it is a great example of where bitcoin could have been of great use to the people of the country. The currency, the Afghani, fell to record lows. Anyone who owned bitcoin was protected and could escape the country with their assets, not worrying about capital controls or confiscation at the border.
Given that China sees how weak the current US administration is, Taiwanese should beware and should have escape plans in place: assets offshore in the US, EU, Switzerland etc and some large percentage in bitcoin. The people of Hong Kong had an opportunity to do so, and probably still have a slight window, but right now Taiwan is in a place where the people should be concerned about the communists at their door.
Bitcoin would be a great asset for savings if only it was a lot more stable - but that is something that nobody can control. Maybe a better idea is having a basket of the top 5 most popular currencies to sort of hedge your bets, even though they often move in tandem. Weight the majority of your holdings (say 40%) into Bitcoin as the first mover will always have a strong advantage over others, and taper it down in a similar way to the remaining cryptocurrencies. The trouble with your idea is, that it is hard to be safe all of the time - you might store a hardware wallet (which might be difficult to smuggle out depending on circumstances) or you might have your funds in an exchange - which are relentlessly targeted by hackers.