Predicting anything about the Altcoins will be just a waste of time. Nobody can actually tell when will be the good time to invest in Alts.
I would recommend you to wait until the fork is done. Do not try to invest before the fork. What would you do if the price of Alts go more down after the fork. You would lose your value and also the free coins. That's what happened with me when Bitcoin Gold was gonna fork. I thought Alts would recover after the fork but instead of recovering it went more down.
![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif)
Actually the alts recovered after the fork. Ark, Omg, Civic and many more gained around 15 to 30% the day after, it was a green day. But it was less than I expected, maybe because people anticipated the Segwit2x so they did not sell BTC. And the BTC gold price was very low, and difficult to sell on exchanges.
But this time, assuming the current value of Segwit2x, there should be a lot of free money coming into cheap altcoins, and a possible and healthy correction for BTC