It does the same thing almost on a weekly basis. I'm not too worried unless it shows signs of not recovering... meaning it goes down, levels off and stays there, or goes down, stops dropping hard, but continues to go down in tiny increments over the next weeks.
There may be a recovery of some sort. How big will depend on what the news from China really is. Rumor has it that the Peoples' Bank of China has asked all third party payment processors not to do business with bitcoin exchanges. So, that would effectively remove China, a major source of trading activity, from the crypto picture.
No confirmation of this yet though that I have seen.