You can absolutely regulate towards the goal of affordable, instantaneous money transfers within the context of the traditional finance system. The EU has done

You can absolutely regulate towards the goal of affordable, instantaneous money transfers within the context of the traditional finance system. The EU has done just that with SEPA (Single Euro Payments Area). Here's the SEPA instant credit transfer service (maximum duration of ten seconds): https://www.europeanpaymentscouncil.eu/what-we-do/sepa-instant-credit-transfer https://www.europeanpaymentscouncil.eu/what-we-do/sepa-insta...