Just like any other market, it has its down time and its rising time.
I just believe that what we are seeing now in bitcoin world is normal thing which is expected to happen to any progressive adventure.
If I were anybody doubting, I will cease and invest more now in bitcoin.
Buy if there is a rumors sell when it becomes a news. If you bought bitcoin at 2300 or even in 2990. In the price of 1850 to even 2000 is a big bargain now. This is the time to accumulate. You can go for averaging or margin buy and sell