I can't really imagine the ecosystem crumbling either way. The only ecosystem I can see crumbling is fiat. Most blockchains have a superior foundation compared to the established system.
In order for crypto to crumble it has to be outdated by a completely superior system and the underlying community has to totally abandon the project. That isn't going to happen anytime soon for a great many of the projects out there.
Look at how much this platform is worth and how few people are actually using it. Apply the same logic to all the other projects. We haven't even begun to experience the network effect.