Most users and traders on panic try to make the best profit in the price increase. By January once again the price fluctuation occurs with steep decrease. This is expected because officially Trump's rule starts in US, now everyone believe that his government supports bitcoin, if something goes opposite to it. Everything gets collapsed at least for a short.
This is expected those people who bought at the lower price may cash-out in order for them to secure their profit. The previous buy support will always turn out to be the next resistance when the price increase of bitcoin is discussed. It is natural in an organic growth, well probably one of the article i read is correct when it say bitcoin is a big ponzi scheme. You get your profit from the new buyer of your holdings when you sold it in a higher price.