I must say that anyone that is current with the market trends will understand that the possibility of Bitcoin coming down is higher than it going up, that is, within 24hrs or on weekly basis. Bitcoin has the tendency to fluctuate downwards on the a long periods than it going up. Infact the green market periods is always very short time than the red market periods, and this has been the situations since Bitcoin was invented.
There are many reasons for this scenario, some of the reasons are, Negative news, speculations, whales activities etc.