Any price under $200 is a good buy in my opinion, which means right now Eth is a steal. I don't have any doubts that it will get back to its all time high eventually.
Sometimes, it even become very difficult to know when to hold or sell out some ethereum.
Either you believe in Eth or you don't, and actively trading it will probably lose you money. If on the other hand you've got some money to invest for the long term, and some patience, you can hold Eth for the next couple of years until it does reach its all time high again. Then you can thank me for the solid advice.