i wouldnt recommend you doing gambling even though you can earn a lot of money with it you will most probably end up loosing money
If you treat gambling as a kind of entertainment, and do not mind losing in the process, then gambling is a way to pass time.
Yes, there are more chances of loosing the money instead of making some profit. No one can predict the earning from the gambling, it can be anything. Its better to look at the gambling as a medium of entertainment and fun rather loosing money all the time.