The key reason for gambling? it's just a habit and addiction.
Its not a habit of everyone so there must be some specific reason for choosing the gambling,even if we are denying that we are not here for money most people's intention is to make money from gambling.
You will need to try many keys because there are many doors in gambling and you will need to unlock all the doors to reach at your target. Dont go for shortcuts because it may not help your more if you are successful in unlocking a door you may get failed in unlocking another door. Dont get it fun if you are playing and betting at the same time while it is full of fun and entertainment if you are not betting.