If there is a hardfork, only the folks who have bitcoin BEFORE the fork will end up with coins on all potential chain splits. For those who wait until after the August 1 potential event to jump back in, you might have a decision to make in the event of chain splits - which chain should you buy in on? Which chain will be the dominant one?
Not suggesting what to do or not. But what I am suggesting is that at this stage, HODLing is a valid and potentially wise option to take until the dust settles, you can't lose money if you don't sell.
Oh and... BE CAREFUL TRANSACTING AROUND THE EVENT TIME!