This is just at crazy levels, and keeps going sideways.
In my opinion, and if you have a lot invested - relative to your financials, take a small portion so you calm yourself down and leave the rest to play as it should. It will go up then 40% down then 200% up. Eventually, you will win much more.
I see ETH easily touching $1000-$1500 soon (and I am not gonna sell). Eventually through 2018, I think it is easy to see ETH at $5000 or maybe more.
Don't panic and think you will lose a lot if you waited, because you are already sitting on a comfortable cushion and many people around here would love to be at your shoes.