I was presupposing you can get yourself out. If you can't physically leave the country, owning crypto will not help you much, except perhaps to bribe some corrupt official who could smuggle you out. Similarly, if the electric grid goes down, if there is a nuclear war, or if a gamma ray burst causes a mass extinction, we will have other things to worry about. Crypto is not a magic bullet for all the scenarios you can think of, but it can help most cases.
Like most things crypto, the initial promise is that is fixes everything (like you initially wrote), but when you dig into it, the reality is that it's often not cheap, often not quick, often not portable, often not anonymous, often not safe, often not unrestricted from confiscation. And it introduces all kinds of concerns as well: losing keys, fraud, insecure wallets, exchanges that lose your funds, ransomware, etc
Crypto has utility, yes. But it is far from a panacea and actually does not "fix" many of the problems its supporters claim it does.
