Blindly holding Bitcoin and a couple of other things certainly isn't for everyone but it has served me extremely well so far.
The thing that separates this from almost every other 'investment' is the absolute unknowability of its eventual fate. The people who end up penniless and insane via crypto are the ones who spout the most confident predictions and opinions which almost always are total clueless shit.
I was already diversified before I got in and there's certainly not been any worthwhile profit elsewhere that I've missed. That's partially down to markets but also my own indifference to investigating other things.