Here's an option to reduce the risk of a single entity controlling all of XBTC causing systemic risk. How about I transfer XBTC to the developers and they by enrolment allocate portions of the XBTC to entities who wish to underwrite the value of XBTC to BTC. The more the better. That way, if any single entitty was to do a 'runner' it would have a reduced impact to the value of XBTC.