Earning money on gamble is hard that's why one should not gamble to make profits from gamble as gambling is not a side job things.
Exactly, yesterday one of my friend who started gambling said that he's made some money from gambling but I told him to be careful because the gambling is not for the ones who want to make money out of it. Sometimes a gambler can make profits and think that he's going to be rich with the help of gambling while in reality that person is not going to be rich but an addict if he/she continues with such attitude.
Whenever there is high risk associated, don’t consider it as a source of earning the money. As high risk is associated, hence there is high chance that you might lose the money also. Hence if you really want to make some money, then you need to leave gambling for that. The question that OP asked doesn’t make any sense according to me. As either you need to be very lucky or need to be extremely rich in order to make some great profits from gambling.