It occurred to me that a more useful cryptocurrency would be one which didn't require a network to validate transactions. It would consist of some kind of (self-mined?) token that can be proven to be unique and to be "owned" only by the holder and likely be associated with a wallet. Spending it would simply change the token so that it's associated with a different wallet. Something like this might be even more fungible than a fiat note having a serial number.
Has a white paper been released describing a systemtoken which reflects some or all of these qualitiesprecludes doublespending without needing a network, at least after it is initially created?