 When craps is played in a casino, all bets have a house advantage.That is, it can be shown mathematically that a player will (with 100% probability) lose all his or her money to the casino in the long run, while in the short run the player is more likely to lose money than make money.There may be players who are lucky and get ahead for a period of time, but in the long run these winning streaks are eroded away.