Some gamblers are smart enough to stop playing after they have experienced a huge win, or think that they're losses are no enough to deter them from gambling. Gamblers are always one decision away from being a 'smart' gambler, and most of them take the obvious and easier choice which is to keep on gambling.
That's a smart one there. Gamblers that don't realize when to stop and proclaim that they are a smart one, they're not really the smart type guy that we're descriving. It's a fact that those gamblers that knows when to stop are the smarter ones. And those who can analyze the situation that they are in and if they've been in a lot of losses, they know when to stop. But when they are in a lot of wins too, they will make sure that they are not going to log out their accounts without having anything in return. That's what we can consider smart bettors, I can claim that I am one of them but I might be full of myself if I do.