Threat -for you if you treat Gambling as a Source of Income to earn more quick Money and also if you become addicted to gambling because you could lose all the money you have and also this will ruined your life because you can't control your self to gamble.
It has happened a lot including my friends in my area playing gambling as the main breadwinner and wanting fast money with gambling profit, so what will happen they lose control of themselves so that their savings are used to play gambling he feels sorry after losing all of it.
Fun- is when you treat Gambling as a time wasting and for fun only, If you have control to your self and know your limitations .
It's better to play gambling when there is free time and the most appropriate is the weekend where we are on vacation working.