maybe, though i'm focused on delivering the basic framework. anything that works with keys on-chain should work here, and with low fees it's easy to limit keys to two uses: once to pay someone and once to pay the change to your own new address.
it may be possible to create more novel ledgers in the same system. the constraints are that fraud be prove-able, total funds under custody be calculable, and accounts be serviceable by anyone with the ledger. notably, the third requirement prevents us from implementing traditiona ecash
