Looking at what purpose you want to buy Ethereum. If you want to buy altcoys or other coins, then ETH can be bought at any time. If for a long-term investment in the Ethereum itself, then you have missed a good price a little.
Whether in red or green season, if you truly believe on the coin you will invest. I believe that investing in an ICO does not depend on what situation has the market have. It always base on how good and promising the project is, surely in the long run of your investment youll see your self ganining more that you are expecting. Before investing, see for yourself wether a Coin is a legit project and really has a good intention in the future.
Etherium have shown really tremendous change in price this year, we have seen how the price dropped frequently from its high peak. But knowing that the etherium have reached a really high point, we can expect that the big come back has still potential to happen again. Last year's sudden rise is unexpected, and just like this year expect the unexpected. There will surely be a high return soon. So as much as you can, buy and hold now.