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When talking about more opportunities to make money, I would say that it is better to choose trading or investing than gambling, but here it is not a matter of how much profit we can get, but the pleasure and satisfaction that we get when gambling so that addiction is more difficult to stop when a gambler can enjoy these two things.
Gambling has the risks of trading and investing also has risks, but on the other hand, gambling provides its own pleasure and satisfaction that we cannot possibly get from trading or investing, so there are no words to waste money as long as we have what we have.
And from this pleasure and satisfaction, it can be very difficult for someone to stop gambling.
In both ways you get positive emotions when win(get profit) and negative when lose(money). In both situations we risk money and play the game. I think that difference between gambling and trading is in the difficulty. When we read the rules for some casino game - it is easy to understand. When you begin trading and try to understand when buy and when sell - it is really difficult to understand fast.