Reaching its ATH at the end of 2018 seems difficult considering the general market situation since the beginning of the year, but nothing is impossible in the world of cryptocurrencies and less for ETH.
Last year for the same dates it was just under $ 300 and managed to climb almost up to $ 1400 in January. Ethereum is a strong coin and despite the bleeding caused in part by the ICOs, I still trust it and I think it will recover in 2019.