Your title is incorrect. There's a difference between a hardfork and a chain split. If we increase the block size to 2mb that is a hardfork which is not happening anytime soon. BIP148 is coming and a chain split MAY happen in the form of a legacy chain and bip 148 chain, the latter of the two having segwit. A hard fork is not backwards compatible and would create 2 bitcoins, this is not going to happen. bitcoin xt, classic and unlimited have all tried and failed. None of the developers on core is on board with a hard fork. A chain spilt is nothing to worry about as long as you have and secure your own private keys. If you leave them on an exchange there's no telling what will happen to your bitcoins. We've all seen what happens when people trust exchanges. I think the price will increase as august 1st approaches as people take their coins off exchanges and into cold storage. Regardless, segwit is coming one way or the other.