I believe that that's actually a big part of it. Many people have a desire to be (or at least feel) smarter than the average, to be ahead of the curve.
Cryptocurrencies, and its marketers, sit in a particularly effective sweet spot of finance- and technobabble (with a sprinkle of defiance of authorities and the status quo on top), catering to that desire.
"Do you have a sufficient understanding of stock markets?"
For most people that's a "yes". They know what stocks are, what they represent, who the big players are to buy stocks on your behalf, and can be assured that the money is going to get to the right place.
This is just not the case for crypto (yet), not remotely. Tons of tech people hardly know how these things work.
I'm responding to the way the op phrased their initial statements. They implied that just because they did not have a deep understanding of something, it must be bad.
Crypto is something for them that they don't understand, just like the stock market is something that many people also don't understand.
- super early stage: curiosity + belief this could replace money as we know it
- early stage: speculation + elements of previous wave
- 2017-onwards: a mix of speculation++, a lot of ignorance, and the mass wanting to be “a part” of a technological future they often feel left out from + the quasi constant FOMO many experience when realizing they could have invested in FB, AMZN, APPL but didn’t. And many disingenuous (or delusional) crypto evangelists manipulating that FOMO and convincing people this is the next big financial movement of the century.