Last week bitcoin try to break $4500 about three times but to no avail! I think above $4500 is possible before the end August as the momentum is very high and bitcoin Cash has rise significant for the past two day to close at $870 yesterday, I think very soon bitcoin Cash traders will start to take profit and fund will flow back to bitcoin.
If there are still bitcoiners holding their free bch they will probably dump at this price. But if majority of bch is from ver and co, then it will stay that way for quite a time. They pump this coin, they'll make it stay that way. And price of bitcoin may still go down if they decided to pump bch more using their stash bitcoin.