I guess, thinking further after @dirvine 's post, that another evolution of it could be as a network-held account with a re-keyable private key…
So, you could have a piece of paper with an address to a server … you could scan it, go to the page on your phone, put in your new password, and have the last owner put in theirs… then the balance would be yours to pass on or to redeem…
Pros…
- Don’t need an account to use it/transfer it. Essentially making a wallet out of any password manager.
- Even if SAFE privacy is breached, not traceable to anything until redemption, e.g. like lightning network on top of SAFE (with however a need to be online to switch keys)
- Damn close to bearer cash in a world with smartphones
Cons
- Suceptable to key loss ( use a password manager)
- Phishing attacks, e.g. a website that looked exactly like an official transfer site
Mitigations
- SAFE cash app? e.g. done with an official app that connects to the safe network, no account and can present the key switch interface…
This could have legs…