It can't be for Bicoin to replace fiat currency, because we know for ourselves using bitcoin we must have internet access and other devices that can support and also bitcoin prices are not stable, we also know that not all places can get internet access, and bitcoin also does not have a physical form, I think bitcoin is more suitable for long-term investment places.
Yeah, I don't think bitcoin can really replace fiat. Having an alt money to used such an online transaction Instead of fiat are really make better for the consumers.