All of HYIPs are indeed shit scam. About casino, there are a lot of trusted and scam casino too, e.g for trusted casino, Primedice, bitsler, bitdice, etc, which these site has provably fair system. Scam casino, e.g 999dice.
Actually you can't compare which site earns more money between HYIP and casino, because both of site have different system. But if you still want an answer, it's obviously Bitcoin casino.