Lots of hype, for sure, but this criticism is too hard for what is still a still nascent frontier technology.
The innovations you listed in "last century"- PC, internet, etc - both went through their fringe, hobbyists-and-nerds-only phases, during which their future value to society was totally unclear and uncertain.
Only in hindsight are these technologies impacts obvious.
While I couldn't agree more about the fact that there's ridiculous hype and (most annoyingly) greedy speculation in crypto, I for one am hugely excited and optimistic about the potential society-changing implications of the this tech.
If your comparing centuries you probably should give this one a bit more time, I mean we're in our second decade...
Well, we got ubiquitous mobile computing this century. That's been working out pretty well so far.
Cloud computing is pretty great too.
Last century gave us things like the personal computer, the internet, and so on. What about this one? Fancier webpages? Selfies? Tweets?
All of this blockchain and cryptocurrency and JS hype is tiresome to see. What happened to making real stuff that works and solves real problems?