maybe, crypto casinos require less effort, investment and risk, which makes them more attractive to entrepreneurs. All of this is based on money, and if costs and risks are reduced, that is surely the reason why they take that path.
I don't think so, both requires huge investments but if it's about the start I think that you're right that it only requires lesser only from the start.
But given that the casino becomes known and popular, there's a need to invest in many things and that's one of the major upgrades that they can do.
Buying security to make their casino have a tighter measures so that they can't get hack easily.
In addition, it must be taken into account that competition in trading is much more aggressive, almost as if they were monopolized. The most popular trading sites take a high percentage of customers, while in casinos the clientele is usually better distributed.
It's hard to win the trading competitions that they manage, it's possible that they've been hiring good ones or truly manipulating the competition itself.