Re: is just buying tokens randomly without any research a good strategy?
Completely randomly? Definitely no! There are more than 4 million tokens, and if you invested in 99.99% of them you would have lost money! A couple of years ago there was someone who gave up on picking tokens and just bought top 100 listed on Coingecko if I remember correctly. He was doing fine for a while, I don't know if there is an update on that. Anyhow, randomly is a bad idea.
Totally fair- blindly picking from 4M tokens is suicide. 
But if you limit “random” to top-trending, active projects with real volume?
At that point, you’re basically doing what most retail does — just without the illusion of control.