According to Mark Johnson, in Quora, "It is possible that Ethereums price will increase after the EtherZero (ETZ) hard fork on the 19th of January"
What do you think?
This could be possible going by experience with bitcoin. However, it think the price will first go down a little, before rising once again. The good thing is that ethereum is the most stable cryptocurrency in recent history, so the price would not go down much.
The new date of the hardfork is January, 20. It is the day of birth of Ether Zero. Suppose the growth of Ethereum is predicted: ETH holders will be excited to get new alt, thus Ethereum price will go up. You can see it already.