It can survive this is what I believe after ten years and with big gap in dominance, Bitcoin is doing great at this point of time, it's the altcoins that cannot survive without Bitcoin, but it's better that there are altcoins around that has different features, it can serve other industries with their features and of course, we, investors like to have a lot of choices and options when investing.
you correctly say that altcoins cannot survive without bitcoin, but it is also true that bitcoin cannot survive without altcoins. think a little bit about what will happen to the market if all altcoins will die? people will simply no longer be interested in the cryptocurrency market and very few people will remain on it, and then only a very small number of people will also need bitcoin