Is there any conceivable scenario in which crypto could fail to continue into mainstream usage?

The obvious scenario that many people will cite is the potential for crypto to be completely criminalized among world powers, but in my mind that is not really possible at this point because there are just too many projects being built serving so many different needs and some of the world's most powerful people are investing into these. The law cannot go completely against what real power wants it to. Plus it is very hard to police. I think China is going to eventually find that they need to embrace crypto. They have a highly controlled internet, which blockchain technology would disrupt.

What else could happen?