It is really tough to beat the casino but it is possible. People out there do it and though it requires great luck to actually accomplish this, it is posible.
It is possible to beat the casino some times. You can win very big in several occasions. But if you keep on playing with the luck based random games, you will lose in long term. That is the reason why there are still operating casinos.
Like what occasions? Every gambling is depends on luck, you can get some profit or not depends on your luck not some event like that. And with that kind of event you will lose much more than usual