It is difficult to give you an advice when you do not tell us what are you planning to do? Do you want to hold those coins for a very long time or you are simply interested in trading ethereum for the short term? If you are interested in the first option then buying ethereum now is not a bad choice as it is being traded at a discount right now, but if what you want are some short term profits then it may be a good idea to wait for some time and see if the price of ethereum keeps going down.