As per current situation , physical casinos are having more high rollers then online or bitcoin gambling sites, as  their is still lot of problem in doing online transaction then playing in physical as you can enjoy the gambling atmosphere and play with real peoples sitting with you. online gambling sites have their own limit and fraud chances are more as if you win a jackpot then withdrawing problem will occur as the online site will start to give false reason and they will block the withdraw and ask you the unnecessary document for verification so that you cannot be able to withdraw