Yes it is possible but i did not read any news yet or announcement of any famous casino's that are accepting bitcoins as their bet. Maybe they will implement a kiosk where everyone can exchange their bitcoins into real cash and buy chips in their place.
Yes of course it will be used in casinos. Casinos are the sign of gambling and when bitcoin will be used in gambling then it will also be used in casinos. If I gamble I will go to casino and I will use my bitcoin for gambling and the place will be casino.
Gambling and casinos are builtin with each other. It is out of sense that bitcoin will be used in gambling but not in casinos. No doubt bitcoin will be used there.
I do not think so. If bitcoin is not accepted in casino because bitcoin is for the cyber network. Instead of going to the casino, people can bet on the internet without any problem or trouble. There is no rule in betting with bitcoin because there is no way the people can trace out who are you and how can you gamble with bitcoin