I just saw this prototype of NFC cards filled with 20k sats:
https://twitter.com/CoinCornerDanny/status/1469330183689756679I'm not sure if that's only usable on specific wallets, but in theory you could have physical cards that represent any denomination you want.
For example, you could prepare some cards and fill them with 10k, 25k, 100k sats, etc. and mark them accordingly. You could create a set of NFC bills for example. That would be a nice gift.
You could also create an NFC collectible that instead of using a hidden private key, it allows you to withdraw from it with NFC. There might be some issues there, but I think something interesting could be created with this technology.
What do you think?
