Can you describe a "society collapse" where your cold wallet _can_ get you out of trouble, and why that particular situation isn't subject to "I will shoot your corgi." coercion?
If you're dealing with a peer you can't trust (like the US government) that will ask for your passphrase and then not torture you for it if you refuse, I'd suggest you're not really in a situation where society has broken down.
You've created a strawman. In no point a said "society collapse". I am talking about failing institutions.
You can find on this very same comment section a handful of people who live in places where cryptocurrency enables people to work around failing institutions and/or protect their wealth from systemic corruption.
I think I offered a pretty concrete example of a real situation and how the imagined utility of crypto magic isn't actually all that helpful.
Now, perhaps what you're suggesting is "I've got millions of units of money that I've acquired through locally illegal means and I want to transport that money someplace else and I don't feel like renting a private airplane and diamonds up my prison wallet are uncomfortable and I don't want to pay taxes or otherwise explain why I have a brand new S class I paid cash for." then yes, I'll accept that there is some grey area where crypto has a place (to explicitly work around legal regimes I dislike, would like to degrade further, and don't feel like dealing with).