I strongly believed Ethereum will bounce back very soon. There are so many altcoins that are using Ethereum blockchain and they are still under development. By the time those altcoins start growing to their full capacity and they will have a significant effect on Ethereum that will result in the price increase.
About three days ago, Cointelegraphy predicted that by the ending of 2019 Ethereum will get to $1900, of which I so much believe (https://cointelegraph.com/news/tom-lee-ethereum-will-rally-strongly-up-to-1-900-by-the-end-of-2019). This is the best time to invest in Ethereum.