Here's what I'm most interested in here: right now, if I'm using an alternative mobile OS (besides iOS or Android), it's basically impossible for me to implement digital payments through existing payment networks. On the other hand, because cryptocurrencies are FOSS and very well-standardized, it's very possible to implement a cryptocurrency wallet. If central-bank digital currencies are closer to cryptocurrencies in…
There are other nationwide protocols around, some open, but most closed, some closed with publicly accessible middleman. Now we are mostly missing some protocol for international settlement between those.
Honestly, I don't get the point of state sponsored e-money. They looks like me-too projects by people that don't understand what they are doing.