What are some similar protocol ideas that are around? Here's a recent [whitepaper](https://www.axiombtc.capital/banks) I found detailing Bitcoin-exclusive based free banking. Here's an [example](https://offline.cash/) of polymer banknotes that can be loaded with BTC.
What are some similar protocol ideas that are around?
Here's a recent whitepaper I found detailing Bitcoin-exclusive based free banking.
Here's an example of polymer banknotes that can be loaded with BTC.