I don't have a lot of experience with online fiat casinos when it comes to lucky-based games (including slots), but when it comes to sports betting and poker fiat casinos still have a lot more active players and better options/bonuses. I still think that crypto needs some fantastic "only crypto" poker places, but I guess we are far from that.
Basically the number of fiat based online casinos is still much bigger than crypto based casinos. I can say it because there are just so many local fiat casinos in my country with many active players. At the beginning, yes most fiat based online casinos were dominated by poker and sports betting but these days, there are also so many casinos that focused on slots and live games. Of course it is because fiat online casinos are also following what is the trend among online gamblers. With these facts, I have to agree that crypto based online casinos is still far from fiat based online casinos. It will take longer time for crypto casinos to be in the same level as fiat based casinos because it is not that easy to lure people with something new (crypto transaction method) while most people is still more familiar to fiat transaction method.