You can store and share VCards the same way, and e.g. Android will automatically offer to create a new contact in your address book when scanning that. I think maybe we should agree on a standard field for adding npubs to VCF?
How to use NFC cards for logging into Nostr, and for giving out to grow your Nostr personal network.
Discussion
Great idea. I don't think wide agreement is necessary. You should propose one! 