In general, this is a very cool strategy and I hope that you will continue to do so, because it is very difficult to give up greed. I try to keep myself in check, especially in situations when I lose.
The control of greed starts with self-determination and control. If you are the type that doesn't easily maintain the decision you have set for yourself, it will be hard to overcome your greed in terms of gambling.
Not only when you are losing to the system, but even when you are winning a few games, your greed can blindly move you to either increase your bet amount per game or not know when to stop until you have completely blown up your account.