Some of those are not issues for fiat anymore, most fiat is in electronic form so the cost of storing it or moving it are low,
no, fiat is still in physical form (cash) and that has not changed. it just happens to also have an alternative form which is digital but still is backed by that physical form.
i somewhat agree with @magneto. the problems that OP mentioned are the small and secondary things that bitcoin can solve. the main feature of bitcoin is that decentralization that it has and all the benefits that come from it.