The BTC price simply got way ahead of itself.
The growth of the last few months was pretty nice and stable. It was only after breaking through USD 10,000,- that BTC went full on crazy. Ever since we broke this barrier, the price has been incredibly unstable, so of course a correction was due. Accordingly a new bottom has to be established. Hopefully above USD 10,000,- otherwise things might get ugly.
Keep in mind that the fundamentals haven't changed -- BTC is still BTC -- it's just the price that is fluctuating. If you're convinced of BTC's long term viability, short term price drops such as this pne shouldn't worry you.