Some people are saying that a big part of the recent growth in Bictcoin price may be due to people buying into Bitcoin in anticipation of receiving free Bitcoin Gold at the hard fork. This might also explain a down trend in price with some altcoins as money is moved across from altcoins into Bitcoin.

It's likely that after the fork people will restablish their positions with alcoins etc and move money back out of Bitcoin and we will see a dip in the price of Bitcoin.

I think that after an initial dip and the dust has settled we will start to see steady gains in Bitcoin again.