Ooooooh, lol. Yeah NEVER risk other people’s money unless you are ready to cover every cent/sat… and if that’s the case then just use your own money anyway. You could put it out there and tell your fantasy football team that they should do this with half the money if they actually want to make a gain on it and split the earnings though.
There are many provably fair games on a bitcoin standard. Try bitcoin gaming. Even bc games