People are selling there bitcoin to buy gifts for New Year, and Christmas. The maximum drop price is 10k i don't think it will decrease more. For me its just a temporary dropping. Its price will increase after these events. Its better to hold your coins and do not sell them. If the price fall it will go up for sure. Just believe yourself and in bitcoins.
People are selling beacuse of the christmas period. After the christmas ends, they will start to concentrate on the trades and they will show a high interest once again. This will happen very soon.