Yes there are some possible explanations which could be related to dip in bitcoin price like some of the miners supporting Bitcoin cash at the moment and the other reason is the cancellation of hark fork or B2X in the November.And now some are trying to make btc price go down but there is no need to worry because this is just temperory downfall and after a while Bitcoin price would be stable and price line would rise fast within end of 2017 just hodl