Imagine you had 5,000 online bookstores in 1997, and 99.9% of them had some self described great new tech but none of that tech was being used by any publisher, distributor, printer, author, etc. I did a lot of research on the top 50 cryptocurrencies and distributed ledgers, for quite some time now, and it's appalling how only a handful (really, like 4) have real world use cases at a large scale and might have a future. Of course, what's more appalling is how people will put their money on all the other 4996 crypto and think that because the price was speculated up, it must mean that the tech is good and will be used in the future.

edit: added the might