As admins, we're not supposed to talk about price. We don't know the factors for sure, but one that probably has contributed to price decrease was the Zerocoin vulnerability that was discovered, and we had to prevent from being used by temporarily disabling Zerocoin protocol. The vulnerability HAS NOT been used in Veil. Also, we plan to re-enable Zerocoin so that Zerocoin privacy goes live again, and we plan to implement some new privacy protocols and migrate away from Zerocoin to a more scalable private transaction system.