What I was thinking of I describe here wit nostr:npub1lpqeg5a0v3t7muyw0md66txcujfqzfde383pfaylkndtmrqsdyzsw4wjuz

I think physical bitcoin notes that can operate trustlessly without electricity would be super cool.

nostr:nevent1qqsxc2plycu8r90nmstg0e50u3272wuyae7pl6g895apd8a7nm6yl5gpz3mhxue69uhhyetvv9ujuerpd46hxtnfdupzp83rzr5q2frfurv3qlzyfx6hq69asyudgsjlfgqk7mn9w4atvh87qvzqqqqqqydfl30r