maybe you can sell and if bitcoin price will fall,you can buy it again.
yeah is benefit if the bitcoin price will go down. what if the price go high and high again? you will regret for it

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but unfortunetly no body knows what will happend in the future even i wish the price will go down, so i can buy cheap

This is the hard decision to make also because of this upcoming event this aug1. If selling bitcoin now and your not earning yet profit possible you will lose. It is best wait for the aug and lets see what the price may upto. If you sell now and the price will soaring high on aug you will regret also. So you may decide whats best its either hold and save it in an offline wallet were you will kept the private keys.