I don't think I am that greedy. I play dice very rarely and sometimes roulette, and I'm not expecting anything back. I hope for the best and expect the worst. You just can't make a living off gambling.
You need sometimes be greedy because if you are not greedy then you do not know how to save money or you have enough money so you do not worry about it. I sometimes have to be greedy and I have to save the money.
Well there's a difference between being greedy and being responsible in handling your money. Nothing good really comes out of greed. In gambling for example, the worst thing that you could do would be to get greed take over as it would refrain you from having enough whether you win or lose.
In my experience too, we could not achieve anything by being greedy. I have seen many greedy gamblers are becoming poor in just one bet itself. If you want to sustain in gambling for long term, you should control over greediness.
You should push your self to control your self from being greediness so that you can not lose all your bitcoin in 1 day..
if we are got many winning then the risk is always forgotten and this is because we are too greedy to win the games and this is what i am do in the past and i only get loss in the games. i realize that i am too greedy when i am winning the games and want to win and win again but the fact is i can not win in every time i am play gambling.
Thats the reality on playing gambling and these kind of scenarios of greediness are just normal which most of gambler and players do lost their money and winnings in the long run because they are still seeking for more profits as you said you cant win everytime when you play gambling thats why if we won a particular amount then we should learn on when to stop to avoid loss.
I never resisted playing with all I had on me unless I managed my money and took only as much as I needed with me. It's very addictive. 
