If you cash out by bitcoins at a casino and the casino doesn't add enough fees for fast confirmation. If the price of bitcoin drops a lot. Should the casino be held responsible for the price differences in which you cashed out at and the current loss in btc prices?
I don't think so. Remember we are playing and using crytocurrency here. We shouldn't really consider the price of it in fiat as that is not what we are playing here. We are not playing $2 per bet but 1mbtc per bet, something like that. So we should not really convert anything even at the point of withdrawal.