Nice post.
But you see, not all geopolitical zones/countries would allow this.
Most don't want their citizens to enjoy financial freedom, they want to dictate and be incharge of their citizens finances.
Banks would advices that "Money are meant to be stored in the bank and not your house", but when you need it, they will offer you what ever they like when it is your own money.
Source
In my country, Citizens que for hours to withdraw their own personal money, is not as if the Government gave them.
So i think most countries wouldn't accept this.
I think the US dollars has been the main transaction between countries for some time now, even the US won't want to go for such idea because every country wants to be at the top and incharge.