As of now not really ok to invest in etherium because of some many needed to analyze the situation in the market especially in value of prices.
But we can expect, that current price is unappreciated because of small market panic.
Ethereum is a very good coin so I suggest Ethereum should be in your portfolio, Blockchain from Ethereum has been used as a big company for their project success, I see almost all ICO projects use Ethereum so I am sure that Ethereum is reliable in the future.
In my opinion ICO and approaching end of the year (good time for ICOs) will pull the price of ETH higher than is now.