"Crypto" is fascinating for sure. Very few seem to understand what it truly is, yet a lot of people seemt to be into it. But from what I gather, it seems like many are into it for pure speculation and gambling purposes, to make a quick buck rather than for ideological reasons.
In my opinion, even those who aren't in it just for a quick buck seem to miss something - if any of these currencies would become a common currency, governments would establish rules and regulations around its use quicker than you can say "taxes", or perhaps ban it outright like China.
Personally I think that proof of work-based currencies (such as BTC) are a neat concept, but are prohibitively expensive to run in practice. Not sure if there's any advantage to these currencies over our current banks for the average end user either.