Bitcoin Gambling Site Deal

A random guy messaged me recently on discord about a bitcoin gambling site that he moderates, he showed me how he can choose who wins a big bet for thousands of dollars on this site by having me choose a user on there to win twice. Then he asked me to place a bet of $100 so he can select me to win and then I split the money with him, but I told him I will buy some bitcoin in a few hours. Apparently he also has several other partners as well and that I can only place the bet 2-3 times a day. It seems really scammy but he showed me some really solid evidence. What should I do?

EDIT: Should probably mention that I asked him why he doesnt just place bets on himself and he said because he can't as he is a moderator