If the bitcoin banned then this will also automatically made prohibition to other altcoins as well. talk that will replace I think nothing could replace the position of the bitcoin because too difficult debuted it.
Yes I think so, altcoin can't be survive without bitcoin and if bitcoin banned of course that's including all crypto currency. I believe bitcoin can't be banned for all countries in the world because still many counties are really support bitcoin, on the future Will many more countries accept bitcoin.