I think the bitcoin is the digital money and now the usage is increasing so the value may fall but it will not below than 7000 because the demand of bitcoin is high as compared to the bitcoin supple and the china exchange hacking cause a fall in bitcoin but it will not affect bitcoin fully soon the people will again use the bitcoin. Bitcoin price right now might be reducing due to some bad news but I dont think it will go far down to $4k. I think thats way too much down for its market, and would create chaos