Bitcoin price fall and increase are common, every time during the fall people will be getting panic and used to sell low missing the profit. With bitcoin one need to have the patience to profit rather than selling on panic. This time the price drop is very big, but the same doesn't have a perfect reason behind as every digital coin is experiencing a drop and only very few are in the price pumping.
Don't panic when its price falling down. It is normal because as what you have said this is a type of digital coin so that the tendency is the rise and fall of it. We don't have to worry when its price goes down because there is a big profit if its price rises again. Of course, patience is very important because if you don't have it, it will lead you to a bad mood. Don't sell your bitcoin if its price was falling instead, wait again until its price goes up. It is the big impact when the price fell down. This is the big possibility for you to have a big profit. There is a great reward that awaits.