Hasn't crypto adoption also generally only gone up? https://financesonline.com/number-of-blockchain-wallet-users...
We are talking about a hypothetical future where the speculation interest goes away.
The poster I was responding to thought that would make room for more pragmatic applications but I'm not so sure.
Some stocks crashed, some specific sites went away, but the people involved just reorganized and made even more successful businesses.
If 50%+ of Internet users decided to disconnect that could cause some real problems.