Taking the current price of bitcoin into consideration, I expect the price might go as low as $3500 - $4000 if something happens unexpected taking it to the negative side. The reason is that during the past the same happened when price went above $4500, in no time went down to $2900.
At this point the only form of negativity I can see have a significant effect on the market, is the November hard fork. It's basically what quite some people are thinking about, and can't seem to discard this potential threat -- it's an expected event, and for that reason people will be able to act prior to the actual event. Aside from that, the reason the price tanked below the $3000 level was because the market was due for a correction, plus everything that happened in China. Now China is no longer much of a problem, there is a major obstacle removed -- definitely a good step forwards