It is not possible to say definitively whether bubble craps is rigged or not without knowing the specific casino and machine in question. However, it is important to note that all casinos are regulated and must comply with strict rules and regulations to ensure fair gameplay. Additionally, electronic craps machines, including bubble craps, use a random number generator (RNG) to determine the outcome of each roll, which ensures that the odds of winning are the same as if you were rolling physical dice.