Bitcoin does not deviate from its purpose of creation but becomes multifunctional in its use, talking about price is not a problem because even though the price is expensive we can still make transactions with bitcoin fractions so it is not a problem even though the price is expensive, some assumptions and uses of bitcoin as an asset or others are also not a problem because bitcoin is a store of value and can withstand inflation making it a very strategic investment asset in the long term.
Yes bitcoin is multifunctional and its not as if bitcoin have deviate from it purpose, I think bitcoin as currency it is something that will take time for it to be accepted to be spent alternative currency. Bitcoin is still in it journey to adoption and with time it will be use steadily for spending. Before now it was very difficult to buy bitcoin and hodl because so many restrictions but now people can acquire bitcoin , that's to tell you bitcoin is growing and time is coming when it will be spent as an alternative currency.
Yes, like what happens in El-Salvador, Bitcoin is one of the alternative currencies that can be used by the community to conduct transactions in that country there will be several countries that follow their steps to adopt Bitcoin as an alternative transaction tool that is not difficult to do.
Whatever the future of Bitcoin, in my opinion it will not escape its qodrat because no one can rose Bitcoin in the world II so that Bitcoin is free and its use depends on the owner of the Bitcoin itself.