I predicted the market would recover in the end of 2018 and I bought some ETH but it has fallen even lower. So I don't want to predict anymore

. Just invest more if I have money and wait until the market go up.
You are not the only one. I do not think many expected the Ethereum price to fall below $200. I also think that the current price is still very good for buying to enlarge the wallet. Let's hope that your expectations for a price recovery will come just with a slight delay, so very soon. I think that Q1 2019 will finally be a good period for Ethereum.