There are some proposals to have the 300k be actually created by the central bank. For example the Vollgeld initiative in Switzerland: https://www.vollgeld-ini

There are some proposals to have the 300k be actually created by the central bank. For example the Vollgeld initiative in Switzerland: https://www.vollgeld-initiative.ch/english/ https://www.vollgeld-initiative.ch/english/ One of the logical extension is to allow anyone to have an account at the central bank, also combining those approaches with a blockchain sounds logical.