No, bitcoin can be tried to ban, but technically it's impossible to organize.
It is not possible to control, and therefore punish for using it.
Hence the ban is absolutely meaningless.
Yes bitcoin is decentralized and government doesnt have any access or control it. But yes it still possible whenthe whole world agreed on it but I think it wont happen. Bitcoin is freely used and developed by many developer and user. It was continue increasing now and what will happen if this will be ban? does bitcoin did any wrong thing to be ban?