Btc will not be took over by any coin/token anytime soon. Btc is the first mover and many consider it as a store of value. Traders normally take profit from alt coins and put it into Btc for a while.
Btc also is the main pair in every exchange.
With current problems regarding scalibility, devs are working hard to solve it with LN. Btc is the only coin that has no Founder that make it unstoppable .