Sweden had a similar system in the late 90's-early 00's called the "cash card", also developed by Proton. It was a huge failure with basically zero uptake, ther

Sweden had a similar system in the late 90's-early 00's called the "cash card", also developed by Proton. It was a huge failure with basically zero uptake, there was no benefit over just using your debit card https://sv.wikipedia.org/wiki/Cash_%28betalsystem%29 https://sv.wikipedia.org/wiki/Cash_%28betalsystem%29