If bitcoin got banned in one place I think it also includes altcoins. It depends on the regulations if there a good option aside from bitcoin then I'll go with it. I believe bitcoin will not be banned in long term because this market will stay with us and it will continue to help us.
Your have a point on that, bitcoin will not ever replace by other currency because the altcoin is also affected if that was happen then. For sure this will not die because there are many people who support now to use bitcoin as their savings because from it they can earn profit easily.