Bitcoin is also used for transferring money. Bitcoin transaction fees are smaller than fees for transactions made by banks. Moreover, Bitcoin is operating 24/7, it doesn’t care where and to whom you send money.
My bank allows me to transfer to other accounts instantly with zero fees. Many other banks offer you similar features.
Bitcoin is incomparable to centralized ways we currently have and one can assume that any new national digital currency will take Bitcoin over when it comes to fees and speed.
Might not be the wisest idea to keep promoting Bitcoin for fees and speed when national digital currencies show up in the market. Would be a little dead end for Bitcoin at the time and fewer people truly care about decentralized aspects of some cryptocurrencies than many think.