segwit2X for sure is very big and difficult step for all project and very hard for investors to predict what gonna happen with Bitcoin price.
Anyway my private opinion is that BTC price will jump over $5000 in next 5 - 10 days and probably right before segwit will go hardly down.. later after tests we will see slow and continous growing up to $7000 - $8000 to the end of this year. I know that this is optimistic, but i belive that it is possible.