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.