After all the information I received about gambling, I honestly learned the following: among all the many ways that should influence a gambler so that he does not lose too much money in casinos and betting, and I think the most effective of them is: honesty and openness to relatives, and their full awareness of how much the gambler spends gambling.
I think that loneliness is the main enemy of a gambler. This is my conclusion.
Being honest to other people is not easy and not many people can do that. Many people lie about what they do and other people doesn't know if those people are playing gambling and even they becomes addicted to gambling. They can't honest with their gambling activity to other people so other people can helps them and search for the solution to cure the gambling addiction.
Loneliness can be the main enemy of a gambler because they don't have any activities to do and don't want to do something that can benefit them. They found gambling can entertain them and dragging them too deep in gambling until they don't wants to do anything else. They want to achieve something from gambling but they don't realizes that gambling is not a place to achieve anything. They just want to still doing that without trying to introspect what happen to them so far.