Anything can happen in the future, but for now Bitcoin is still the best blockchain that is widely used. There are other coins and they are also working but nothing can stop Bitcoin from being the best. Bitcoin is open, transparent and for all and it's already being accepted in some countries as means of transaction.
I do not think there is something that can beat bitcoin even in the future since it is the very popular coin along crypto. It is popular to make exchanges and used for payment online shops. Wait until all country accepts bitcoin that can help not only their people but even in their economy.