Bitcoin can provide a way for e.g. Argentinians to get their money into other currencies when the government is actively preventing that through "standard" mechanisms. It's safe (er, safer) from that perspective.
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).
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".
If a government is preventing people from transferring money through standard mechanisms, it's only a matter of time until they prevent them from using crypto to do that. If the best use is circumventing the law, it isn't much of a currency at all
Not to mention, a $20 transaction fee in Argentina is devastating.