I wouldn't say that gambling is wrong, because it's your money and you're allowed to do whatever you choose to do with it.
However, in my personal experience gambling is more likely to bring loss than profit; I know many people that have gained a lot from gambling, but I guess I am not as lucky as some people so I just stick to micro-bets for the most part.
If you know that you are lucky and you can win money with it then gambling is not wrong, but if you know your limitations and still you continue to gamble then you know what would be the outcome.