There's a distinction that Kong is not payable on demand, until after expiry, but I'm not sure it's a useful distinction. Unlike a conventional bond, there isn't a question of default by the issuer; the Etherium is locked up in a smart contract, rather than relying on the issuer honouring the bond at maturation.
Rarely do users of cash care about the property of it being payable on demand by the issuer (conventionally a central bank), only the property that it be practical for physical commerce.
Rarely do users of cash care about the property of it being payable on demand by the issuer (conventionally a central bank), only the property that it be practical for physical commerce.