I don't think this will happen in the next 50 years. Because the dominance of the bitcoin is way far from the sum of all ALTS. But Rise of Harmony, ADA, Eth, BNB , Cake these kind of a projects have the potential to do the change what you expect.
Those alts you mentioned has been reached an all new time high in the market. But I still can't see these can replace bitcoin in the future. Many users assumes there is an altcoin can replace bitcoin but up to date bitcoin has high dominance for all altcoins.
Bitcoin is bitcoin and there's no need to argue, it's called alts that serve the purpose being alternative but the main
one will continue and it's Bitcoin.
We seen good growth with those mentioned projects but still what's popular all over the world is Bitcoin and it's continuing
we should learn more about the market and how things works around.