The argument that Bitcoin saves the user from fiat inflation is a "Store of Value" argument. There already exists many far superior stores of value in S&P 500/Real Estate/Gold. The only reasonable argument for Bitcoin
as a "Means of Exchange" is that it saves the user from extortion (censorship).
good stock to flow ratio allows bitcoin to be used to store wealth, at the same time digital nature of the bitcoin allows to use it as more convenient mean of exchange than gold for ex
