:)There are lots of things that could able to make bitcoin die. 1st. No one will use any cryptocurrency 2nd. There would be a new crypto that would replace bitcoin 3rd. No internet 4th. All government would ban it globally. and there are lots to mention but still we know that bitcoin wont die easily.
As many have said before, a ban on bitcoin will only make it illegal but it will not stop people from holding it just look at all the things that are illegal and that people still use, about your second point even if a new crypto appeared that replaced bitcoin that does not mean that bitcoin will stop being used by the people.