The hypothetical death of crypto would not mean the death of the technology and ideas behind it.
Crypto as we see it now may cease to exist, but that would likely be because it has evolved or something better has been created .
One saying I very much believe in is this "technology and ideas can hardly, if ever, be destroyed"
We must remember that even if one computer in the world continues running the bitcoin "software" so to speak , then crypto will still exist.
ifcryptos were to cease existing, the ideas of so many will not die, we will adapt, evolve, integrate our ideas, the concept of decentralization will live on, and we would have a different world than if crypto had never existed