After segwit2x launch we will get another new coin bcc to have in form of new investment options . So probably it may be possible that many people buy BCC coin and  and other altcoins goes back down .
Here after the segwit2x , the big change will be the market to go up , because as usual most of the people will enter in this field again to make earnings .
Many bulk traders ( who are newbie ) will come back to trading and will increase the demand of the bitcoin in the market of cryptocurrency and that will results into up in price .
And also many people who were not interested in trading will again start trading because fee will be low after segwit2x because size of the block will be double in comparison to the current time .
So everything we will get better after segwit2x launch .