I'm not sure why you think there has to be a world-ending cataclysm for this to happen? If there were any major change in the way societies or economies were organized, Apple the entity could cease to exist entirely, or some/all of its assets could cease to belong to them. Like for patents, it certainly seems like the world is very far from deciding to abolish IP, but if society wills it, it is very simple to do.
By contrast the sudden demise of all crypto value could also happen, in the same sense that tomorrow might be cloudy.
...Whereas blockchain assets going to zero doesn't even register as a blip to the average citizen.
Devaluation of cryptocurrency assets, on the other hand, could come about from someone sneezing. Or other events which would have similarly little impact on any asset valuations outside the crypto bubble itself.