An excellent overview and against the background of a general correction of all crypto currencies, the Ethereum also continues to fall and your question for is quite relevant.
The perspective of the etherium in 2018 is a popular user question. Acquisition of the Crypto currency, exchange for real money and other aspects depend solely on the growth forecast. Frequent jumps in the course of such a currency become a real find for active traders who profit on the difference in the changes in the cost of the Ethereum unit. Counting, whether Ethereum will grow, it is possible to draw an analogy with the last year. So, the possible growth at the end of the first half of 2018 may be around $ 350, and by the end of the year to approach the mark of 400-450 dollars. But I think that as long as we follow these figures, the price of the Ethereum in the near future can settle below $ 300, here is the moment of truth and the most convenient time to buy. Of course this is only a forecast and each of us must decide the distribution of its assets! Thank you @cryptographic
It could maintain a relative long term more sustained trajectory. That wouldn't be out of the ordinary. At least for a couple of years anyway. 😉