If that is what you called it then yes they will be extinct but for me the right term is just they will be replaced because they are gonna be still here maybe in some collectors hands but they will not be used anymore no production of them anymore because digital currency will take to their places. But i think that will going to be 100 years from now because the people still cannot cope that much into technology but I know it just takes time to accept that changed that is happening. Whats happening now is the start of it.