Printed money is worthless and only as valuable as a person believes it to be or accepts it to be.
Crypto is the same, it’s run by a votile market, people manipulate it just like anything else, lots of pump and dumps going on, in time governments will implement some sort of new monetary system, and may very well be on a blockchain.
So yes crypto is here to stay, but Gold and Silver in hand are really the only true assets I believe that are actually owned by the person holding them.