Bitcoin is already utilized more than any other coins in the world, it may become global currency in condition if governments regularize its use in respective countries.
Also, some altcoins like ethereum, usdt may live longer or forever but there are almost shitcoins with no future means
I also think that it is quite acceptable that Bitcoin will become the main currency of exchange and another 2-3 cryptocurrencies. But at the same time, other cryptocurrencies will exist on separate platforms, about 50-100.