Whatever bitcoin is or will become, it will not make alts useless because they have still their function for certain areas. While I agree that many alts if not most are simply useless for the majority of the people. However, everyone has the right to try his luck with his coin. Do you think bitcoin ATMs are an argument for bitcoin? In my opinion not, because we should try to get away from the fiat system and ATMs converting crypto coins to fiat will not assist it.