That's a great point, but at this stage I do think there's a critical distinction between something that's inherent to the platform and something that sits on top of it. Right now we're really focusing only on building the platform and ensuring that it's eventually widely used and trusted.
We have some thoughts about systems for building trust in issuing parties, but that's a long way off!
There are some non-currency assets which can be recorded on hyperledger which don't necessarily have the same concerns. For example, stocks in a company, airline miles, or phone credit.