Let's talk;
You're in Crimea right now. You want some gasoline. You have some magic numbers in your magic rock. It needs you to cast a spell to transmit those magic numbers to someone else. I guess it probably also needs ... some electricity and some network access and some time to make those magic numbers update in the gas station's magic number.
In what way is this actually going to help you in a total collapse? Let's stand around over my iphone and cold wallet and spacex terminal while we wait for things to beep the right number of beeps?
In the off-chance you find yourself in this situation, what's to stop the party with the gasoline from just pointing a gun at you or your corgi and asking you to add some zeros to the number of magic beans you're zapping into their magic number?
Now, perhaps you as an international agent of mystery, can use some shiny rocks or magic pieces of paper to make your escape, and you can then, once safely back in a stable society, use your magic numbers and spells to transfer "wealth" to some organization closer to your new physical location (let's say belize?) -- in which case, to avoid a bunch of tedious laws and such, perhaps that magic trick will work in the way you suggest.
But, when things go haywire and there's just Hobb's all against all, I'm not sure a magic cold wallet of certificates is going to do much.
If your only idea of "institutional collapse" is "living in a war zone", then I envy you and your sheltered life.
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.