I don't think many would have sold their coins when price touched $750 as everyone was hoping that price will cross $800 very soon and missed the boat.
Many people do dumping at that rate that's why we are here in the current state and didn't established a resistance at above $700. Still price today is way more better than sitting at below $500 for long period of time.
There is no need to worry about the short term price. As long as there good development of the bitcoin, the price will rise.
i don't think the latest block halving will have any impact anymore as it is history now. the price will go up, but it has nothing to do with the halving. the good thing is that with 50% lower block rewards the selling pressure on the market has decreased significantly. we just need to have patience as i am quite sure that we'll see another rally this year.