IMO There is no smart or profitable way to gamble, it's just random and there is a good possibility to lose as a possibility to win "and actually lower with the house edge".. I think of gambling more of a fun rather than actual investment or a method to get actual profit.
gambling is a place of entertainment and as these all are games so if a person will have good experience in playing any games of these then he will be smart and those who will not spend all of his money at once then he will also be smart.
its easy to say that it is just all for entertaining but when we start to get engage and attached our self in it we will not be able to enjoy anymore but we will start getting addicted to be wise we need to control our bankrolls we need to make some plan aiming for enough earnings and enough losing is the best way because playing aggressively will turn us out to completely lose in the long run.