We understand but we don't agree.
Satoshi said we need a new payment system, and you conclusion is that this payment system will replace all fiat currencies all over the world completely. Big step , don't you think?
yes i also don't agree.
Because basically satoshi created bitcoin not intending to kill paper currencies and he did not expect bitcoin to be a substitute for a conventional conventional currency to make payments, but only to save the world from the destruction of the global economy at that time.