People took profits when the price reached 2,800. It should go back up again as people will start buying Bitcoin for Bitcoin cash before the Aug 1 deadline.
As soon as people start receiving Bitcoin cash, they will sell their Bitcoins to buy altcoins. It could retrace down near the trendline support around 2,600. But it should go back up again and retest the 2,800 resistance.
Now is the best time to buy altcoins, by the way, because everything is cheap.