Almost all other coins are better configured than BTC.
As a point of sale payment, there are already many options better than BTC. Loads of networks are almost instant and virtually free to transfer. I think that this market has definitely yet to be decided. There may be more than one eventual winner. The eventual winner(s) may not have even been created yet.
Smart contract ability will probably come down to the current main players like Etherium, Cardano, Polkadot etc. But there is loads of room for different platforms, especially with cross chain functionality bearing fruit now.
But when it comes to the international currency that all other coins are measured against and acts as the reserve currency… I think that has to be BTC .
I could be wrong of course