As somebody who saw family wealth slashed 100x due to crazy inflation just 20 years ago, 2x fluctuations are nothing. This is the perspective worth recognizing. Bitcoin is actually very stable by comparison. Edit: fat fingers typing.
Ouch. My condolences.
Yeah, if things are that bad, it could be viable.
Civil war is another viable scenario. However, one should also assess the situation properly if his/her country is in civil war. If things go bad and you have to escape, "safe passage for x amount of gold I have on hand" is more guaranteed than "safe passage for x BTC I promise to pay".
As someone from a country which has had its currency's value slashed to half 5 years ago, I genuinely don't see how Bitcoin is safe at all. If anything, gold or real estate are safer.
Sure, if it is somehow guaranteed that I won't wake up tomorrow seeing 1 BTC = $30 000, I could see your argument. But is that guaranteed?
I would also like to add that the swings that BTC takes are unpredictable (at least for the common people who would benefit from it being a safe storage for their wealth).