This seems to happen to many people, the way they think when gambling is different from the way they view everyday life.
Of course the factors are very varied, it could be the desire to win big at gambling. Therefore he will go all out and not use logic well so it looks like his alterego is working.
i believe that's normal to most gamblers especially those who are playing online as people don't know their attitude when in online. they can totally be the opposite person as they can display their true behaviour online because no one is judging them. i guess, that's one advantage in playing online. you can mind your own business and no one will bother you for what you are.
I don't have any alter ego as far as I'm aware; I'm just exhibiting my normal self whenever I'm gambling. I just play normally and don't exhibit anything unnatural from what I normally am. I believe that people who have an 'alter ego' whenever they are gambling is because of their excitement and their knowledge of what they're doing. Of course, you wouldn't normally be a high stakes player if you don't know what you're betting on. Then again, it might just be the dopamine that pushes people to do some things that they normally wouldn't do.
i am also on this level as well. i am the same person as when i am playing online. maybe, a lot of people around me don't know that i am betting online. but that's it. they don't need to know that, right? am not stingy or generous, just the same as what i am everyday as a regular person.