I think the drop was beginning before the Citibank winner was announced and was because people were discovering that their was no official partnership with Microsoft and Minecraft. Now, I originally blamed this on ignorant investors believing headlines on the internet but some have said that Digitbyte may have started the 'fake news / rumors' or, at the very least, did not correct them but may have encouraged them.
The fact that they made it to the 'finals' at the Citibank challenge.... and the fact that they were even invited tells me that there is something there that is worth a decent coin price.