Until when ethereum will continue to decline, will it touch at the price of $ 50?

It shouldn't have fallen like this.
December this year is very different from December 2017. The situation is reversing.

I also can't help wondering why this is so inversely proportional, in 2017 the price of coins at the end of the year was fantastic but in 2018 there were many people who surrendered to their coins who were traded because,
the prices were not necessarily high and not necessarily low.