Features are the most important aspect of casinos' tokens. If they provide staking program, extra spins, a share of casino's profit, increased rakeback/cashback, more referral bonus you have to calculate how profitable those features will be for real. In case you conclude it's going to generate some nice income for you compared to the amount of money you have to invest on the native token it must be interesting to try the investment. Consequently, you don't have to worry about profiting through trading, because you will be already profiting just by holding the tokens.
This is a very valid argument. However, I think it can be quite difficult to figure out which use cases for tokens will bring the maximum benefit for you. If you participate in different bonus programs, then only in practice you can understand what it gives. Many times I am faced with a situation where you expect one result, I still get less than expected.
But of course, by trial and error, you can understand which options will be the most attractive for you, even if they do not bring you maximum profit.