Can anyone tell me if you know any website where you can play online chess with other people
and that both man can invest crypto and winner takes it all?
I'm not sure if there is a chess game to bet online using money or crypto, I haven't found it but if P2P chess game is online then the witness can see the game, then you can submit an agreement with your opponents to bet, another option is to use an escrow service then the winner will take all of the bets.