My opinion, I think ethereum will still see some good days, because even with the drastic price fall, ETH still maintain the number 2 spot in coinmarketcap, that is impressive and that means the volume and the usage is still there, so my conclusion is ethereum will sure come back to outstanding price
Nobody can really tell if this is already the bottom. If you feel that this is indeed a good price already from ATH of Eth, then buy a few eth every now and then.