It's hard to say because now is behaving diferently from the previous fork. With bch fork it was dumped before and pumped after. Now is being pumped so I really have no clue.
I do not think there is going to be a drop in the price of bitcoin there is another fork coming so what it is the point to get out of bitcoin when you have another opportunity to make a lot of money with yet another fork, however after we get that fork in November is possible we see a reduction in the price of bitcoin.