The blockchain will for sure disrupt certain businesses. That's way there is so much FUD going around. It shows, that some companies are fearing that there reason for existence is vaporizing!
But we must not confuse cyrpto with blockchain. A blockchain can run without crypto, but it is much harder for crypto to keep on going without a blockchain. I do expect that there will be blockchain coming, private blockchains, which will run without crypto! If there is enough advantage to keep the blockchain running, then there is no need for cyrpto!
Also the blockchain technology is not the solution for all problem, the old systems are facing now!