In my opinion Arsenal was even lucky to have draw the game and had it been Chelsea converted their chances it would’ve been a different story.
I think wealthy people usually have the notion that bigger risks brings bigger rewards if successful so they often go for endeavors with bigger risks. I think this is very similar to how Drake picks his games at stake. I believe that even though they lose several bet slips, one win can cover many of their losses. Risks is an appetizer for them afaik.
In this guys own case, 5 m in naira means nothing much to him and as a matter of fact, he can and will make that money through another bet, and he should be cool with it, it is only a problem if he has some close member of his family still living in poverty and he wastes such an amount.