Can Bitcoin be ban?
Yes, it's possible. Bitcoin can be banned from some countries but people who loved bitcoin will always find a way to use this. They can banned bitcoin, but the government or no one can ever stop us from using it. Even if they banned it, we will still surely use it. So banning bitcoin from countries will be useless. They can never control people.
I think many government, especially those that are negative about the cryptocurrency market and bitcoin use have showed great interest in controlling the use of cryptocurrencies in their locales. One of the control measure would be to ban bitcoin if they would feel that it would be bad for their citizens and with their own economies. Unfortunately, not all countries want to take advantage of the good things bitcoin or the cryptocurrency market might bring, so instead of supporting it, they want to regulate it.