That 10 percent under face value piece stands out, it feels like a buillt in buffer for parity. Linking each coin to an equal amount of electronic gold keeps the loop tidy and and makes conversion feel easy. Shipping coins while letting e gold zip around is a fun contrast, scaling it will be messy < but the clear pricing makes the whole plan sound more real.
Expect the Switch to be Flipped when Silver and Gold are no longer available…