Most casino games are rigged and based on pure luck. You can only win long term in games where there is no casino edge and/or some type of skill involved. For example poker. But even then most people are not skilled enough and end up losing money.
I find trading crypto a much better way to make money than for example poker. But it can be both sketchy at times. Getting rich is not difficult at all, staying rich is. It's all about managing the risk. You have to think in probabilities and risk/reward ratio's.