I'm still fascinated with what happens to btc when it gets to $0.01 = 1 sat. the private key couldn't be printed on the note, but the public key could, allowing for verifiability. tx fees would lock the utxo from transfer for probably anything less than 2,000 sats, probably a lot more if network congestion averages high. You could also redeem the notes from the issuing authority for an on-chain transfer. i feel like this is an unintended feature of bitcoin (but maybe it's by design) to back a physical cash, off-chain system. am i just day dreaming?