I think the answer to your question is both. Why both? Because High Roller Gamblers who play at physical casinos can play online casinos too. Not only on Bitcoin casinos but all online casinos with different currency. Physical Casinos attracts gamblers because they provide excellent quality service in some Casinos. They have events wherein you can see while inside. The only problem with physical casinos is you need to went there and play only on your free time. Unlike on Online Casino you can play anywhere, in the office, house or any places that you are comfortable to play.