What are your plans currently and what are you planning to do before this date? sell everything? hodl no matter what? maybe try to profit from a chain split? I'm personally still confused and I'm not sure what to do, I prefer waiting to see what is the standpoint of more exchanges and services.
I think you should keep the bitcoin, do not need to buy more but you should not sell all the bitscoin you have. If you feel unsafe, you should divide your bitcoin into two parts. The first part you sold out, the rest you should keep waiting through August 1st. I am sure after August 1st bitcoin will rise in price.