What do you guys think? Should he tell his parents or secretly invest the money while acting his regular self around the house?
I think that child already understands his family situation, of course he knows what is good and bad when he wins gambling, he definitely understands his family situation.
But if something like that happens to me, of course I choose to be silent for a while, instead of having to rush to tell my parents where the money came from, there are actually many choices that a child can make with winning gambling money, so that his parents do not scold and suspect, because he is unemployed.
For example: online gambling is currently very secret, only we know the wins and losses, except: we are too overwhelmed with wins.
I think that the child can just take the money and go to the bank or investment, there is no need to take large amounts of winning money, he can take what he needs for himself, after that he could go out of the area for a while to dispel his parents' suspicions, that way it would be better, if one day he wanted to give the money to his parents, obviously they would think that the money came from his job. wandering, not from gambling.