Comment by pmarreck

> that will literally kill people (eg. Trafigura)

I had to google that. Shocking story.

> To them, it is like a game.

I think you're right. I also think Trump (ahem) once said something along these lines: "At some point, all this stops being money and is just numbers that you want to keep going up." That would support your competitiveness assertion. (It might also explain why men tend to make more than women, but I digress.)

> I think its the same mechanism that will drive someone to grind for many hours in an MMO or suchlike.

nah, that's just the variable-ratio reinforcement schedule :) https://www.verywellmind.com/what-is-a-variable-ratio-schedu...