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 would never have believed ETH would ever fall below $200, but it fell far below it, and currently $95. I am almost loosing hope on it, but since most other coins are also affected, it means it too may come up again.