Buy now if I were you. But not all in. Try to buy slowly and accumulate. Because the market now is still unpredictable. We may go straight $3000 before August or we have another correction. What is important is Segwit2x already locked in.
Many people are already buying Bitcoin right now. Hoping after 1 August BTC prices will be craze. Before August 1st everyone was worried, and some raced to take advantage of this moment.
I can only see, what will happen next.
i think those people who are confident about the price of bitcoin that after 1st August it will start increasing so such people are in fact buying bitcoin in advance and they are holding it for the price increase. to me as i have already a good number of bitcoin and therefore i have decided to hold my bitcoin even after 31st August because i am also sure about the price of bitcoin that it will continue increase for a long time and very soon going to hit 5000$.