Theory
I think because many people are buying now BTC due to "free money" the schedule to be at November ( BTC GOLD ) I believe that its price should go down because many people also transfer there funds from altcoin to bitcoin
And it good time to buy altcoin ( maybe wait even a bit longer )
What do you think?
That might be the case why people are buying it before the fork. Bitcoin is a great investment let's not forget it. Regardless of the fork people would still buy it.