I want my friend to lose a lot of money
Why do you want him to lose a lot of money?
I found out that he's been cheating me for a long time through playing poker with his friends.
It sounds like the friend is terrible and you shouldn't be friends with someone that cheats on other friends. It's a bad sign and you have the right to cut him out of your life. Otherwise, this friend will always be looming around and dragging you down and likely cheat on you via other means.
He has a lot of money so it doesn't matter.
I'm just saying that you should tell him you don't want to be friends with him anymore. It'll probably be better for your life.