So I thought we could first make it possible for the state to withdraw money from circulation.
This way you can print money if needed, but that cause inflation. or reduce money, that would make it's value go up.
Depending how much each currency is in circulation relatively to each other would decide the actual value of each one, compared to vbx or any other standard you want to define. You could perhaps update the value only when any currency amount in circulation changes.
Unfortunately we don't have the math guys anymore, but I was hoping you could do something like this.