Yes, it is the greed which make us loss in gambling. I remember a few months ago, i played dice and was winning together few consecutive wins. I was playing with a strategy and keep on investing slowly. Just than greed came in and i invested all my profit at once and lost that on a single dice game.
Anyways that was part of the game as there are many good moments in gambling too. It is a game where you will enjoy both the moods, Good and Bad, depending on the luck.
It is not greed that would make you lose as losing is generally a part of the game already. Greed on the other hand is just an attribute that would make you get burned and lose everything that you have. A lot of people get so greedy, that they let their emotions control them, they want to keep winning after winning a whole lot already or they just want to keep pushing their luck to see if they could recover all they have lost one way or the other. This is the reason why greedy people often end up becoming addicts.
Luckily, I ended up doubling my coins on that accidental max bet. This happens for players when they are playing too much on manual. That might be the reason some popular casinos removed the max bet option recently.
You really want to count yourself extremely lucky in such a case as it could have always been the other way round. My worst moment was not setting limit on an auto roll and then I had these long streaks of losses that almost left my account with nothing or just some tiny piece of funds left since the next bet could not pick it up. It was a silly mistake which I really regretted but even if I go back to gambling today, that is one mistake I will never ever make when it comes to gambling online.