then what are you proposing we use as an escrow for btc bets? Or are you proposing that we constantly bet between cash and BTC and have to convert it possibly losing or gaining money?

Either way if that is how you want to do it that is fine.  Personally i dont mind paying the vig at a sportsbook and that is why i make the majority of my bets there.  I only check here to see if certain people want to take the other side of any of my plays before i put them in at a book.