Do you have any patents that have worked for years?
Or do you still have to be spontaneous?
Statistics?
Or maybe just intuition?
If you do it solely for fun, then only luck is with you. If you do it more professionally, then you need more statistics. And don't forget they don't like being beaten!
Casinos are created to Take Money from gamblers and not the other way around so yeah they don't like being beaten.
Personally, I'm not good at sport betting, though a good friend of mine actually earns enough from betting that he doesn't have to work. He has been blacklisted by some bookies but there are literally plenty of trusted bookmakers online these days so he's coping well.
Really?he is not working and living only from His gambling income?