The article skips over the biggest risks of running an anonymous market like this. 1. How do we know the pricing feed is not tampered with. If Bitstamp takes a

The article skips over the biggest risks of running an anonymous market like this. 1. How do we know the pricing feed is not tampered with. If Bitstamp takes a huge position in this market they can make it so that they win. 2. The 'trusted oracle' velocity can also take positions if it sees a whale opportunity and steal funds. As an aside if you have a trusted oracle then there's no need to use ethereum. You can implement all of this on the Bitcoin blockchain.