Price of the bitcoin will always drop some but there are also risings and that is the reason why the bitcoin is goign around the value of 600 dollar he never drops allot but when he does eveyone makes losses .
Price volatility of bitcoin is one of its characteristics thats why we experience rise and low because of any circumstances that are happening on bitcoins ecosystem. Its dropping because there are users are selling their bitcoin for the current price thats why it lowers down its price. Just a simple law of supply and demand.