It was obvious that there will be a correction of BTC price. Every crypto currency goes through this route. If price goes up according to prediction or not, price declines after sharp rise. It is quite normal in case of any crypto and BTC is nothing but a crypto. Sometimes it is plain gambling. I do not know other causes. May be the OP is fully aware of the news. I still do not think it is a good time to buy BTC
Look at the Chinese Yen's charts, and compare it to Bitcoin. The Yen rose up so Bitcoin's price had to go in a freefall. It's been just a bubble, like 2013. The good thing is that the price will now probably remain at a stable 700-1000$ price for the next few quarters: Q1, Q2 and Q3. I think the big bubble will come up in the following winter, so Q4 2017. I'm looking at the news and events very carefully, and things aren't looking good in the future months.