people bought fibre to get the 10% discount. when that sold out they probly cashed out to btc to get in since that was the only option. good time to get cheap fibre. I am a little worried though now that its out that XC sold their premine, that doesnt reflect well on blocknet or fibre. I hope you guys have a system in place with blocknet to not give XC too much control because at this point I dont trust them at all. I dont want their poor decisions to hurt fibre or block.
Don`t worry , we won`t let hurt Fibre

All participating coins are equal and have the same rights , there is absolutely no central control
We can`t tell other devs what to do with their coins though
We are focusing on Fibre of course and as you can see not many were exchanged to Block

Yea I think misconceptions about how the 10% discount would be offered may explain the drop. That being said, the activity preceding the price drop on bittrex almost looked like an intentional price suppression. I ton of (presumably fake) buy support disappeared right before the large dump. What is clear is that the price drop had nothing to do with fibre itself, which means buy in my eyes.