Personally I have my limits for the number of bets I play within a time frame. After 3 bets, I most likely back off even if I'm winning or losing. You are right when you mentioned that people get greedy and keep Betting when they win bets, making them lose at the end most times. Let's remove greed from the picture and know our limits.
Say it to those greedy stupid gamblers out there 
. They don't know what are they limits and they will just gamble and gamble and they will only stop if they have no money anymore. I also have limits when I'm gambling. Around 4-5 bets is enough for me and I only spend a small amount on it. I don't want to get addicted into gambling.Its easy to say those greedy gamblers, but it is hard that they understand it, because they have cross the limitations in gambling and they can't come and stop in limited manners, because they become greedy and have addiction of gambling.
When it comes to greedy gamblers and addicted gambler, they are hard to accept the loss because they cannot realize that in gambling, someone should lose and the other people should win and that is because of luck. They cannot accept to get defeat by another player or by the house because they feel that their luck comes to them and they should win. We should prevent us from becoming like them by anticipating ourselves to lose control, and we try to accept the loss no matter if it's hard to feel.