Btc main use case now is this:
Bitcoin is good market prices indicator to show just wich way all other coins likely will go.
If there is another reasons to use ....its unlikely.
People say specially traders that btc price is good indicator also to show wich way altcoins might go.
For payments and moving funds the stablecoins are definately best ones.
But yeah..now we know btc main usecase
sorry but i don't understand what you are pointing here? what is the main idea of how you portraying bitcoin when that is far from the reality of its function ?
like what said above me it isElectronic exchange Medium and that is the main subject of bitcoin function , but that does not reflect on your belief above.