As I know why Ethereum's value crashed is because of the value main currency which is Bitcoin other than that is those active traders who trade their currency everyday and I think that's the another reason why Ethereum's value going down everyday. I think it is now hard to predict if it will gonna recover his value this coming year.
yes maybe as you say and it's difficult to predict how in the future the value of Ethereum, many expect Ethereum to increase and return to normal. if Bitcoin increases maybe Ethereum will increase too and other Altcoin will also increase. for the end of this year back to normal it is very difficult because it has just risen a few hours or days, the value has dropped again.