Actually we dont kniw what will happen in bitcoin august 1 if bitcoin price increase or decrease but for sure after the date of august 1 the price will increase because many people buy again bitcoin so the price will continue to increase again.
Probably we may not know exactly, but we can predict what is going to happen and how it will be. As per consensus till today, only soft fork is going to happen which means we are not thin threat of chain split. So, we can expect prices to continue its rally toward new ATH too.