Well bitcoin just fell to exactly 2000$ USD, so if wanted to buy, I would definitly recommend buying a bit now, and then seeing if it drops even further, and them buying from there. This is what Segwit is causing to bitcoin, and it is making us all nervous and selling now. And to drop bitcoin even further, people are selling at, say 2200 USD, and then re-buying at a lower price.

Well what happens after the hard fork, if it does go through, should be quite simple. I would definitly speculate a re surge in Bitcoin's price and a drop in Alt coins. I would think that Bitcoin may hit 3k in the days after the hard fork.