Once you create or sign a deal its a done deal. You can't renege on that. You sign an agreement with the other person and they will hold the money hostage till either the deal is completed or not.

This guy used escrow.

https://nypost.com/2017/07/17/poker-player-goes-all-in-with-...

>> Tomorrow’s me is perfectly capable of reversing any decision whatsoever I make today.

True. That's why the stakes should not be too high nor too low.. its pretty experimental..