Cryptocurrency ecosystem in 2018 is totally different than previous years.
One can compare 2017 vs. 2016; but cannot compare 2018 to 2017/2016/2015...
Why?
1) Big investors arrived.
2) Future buy/sell options come in effect.
3) Governments are digging into cryptoworld & talk about regulation.
4) Big price drops broke the trust among new investors.

Let me tell again, January drop cannot be compared to any other. People say every year price drops in January. Take a look to graphs. The price drop were never this long and sharp. There is definitely something going on, but so far I couldn't figure out.