Ah heck! I thought I'd be first! You are too quick.
Never gamble in a game that two can play!
"I have always considered it self-destructive because games are rigged for you to lose." - Now_is_The_Time
Gambling will not exist in institutional settings (Las Vegas or church basements) unless the house wins over time. Such "unfairness" is not itself destructive to players, unless one believes that consumers are irrational in weighing subjective value against costs - a dangerous belief, indeed.