Most likely, those who wanted to make money on halving of Bitcoin have already sold their coins. Growth began long before the event. And given the current unstable economic situation in the world, there is no guarantee that the halving will help fix the price of Bitcoin at new high price ranges.
They thought that the price will suddenly goes up. But as we observed the market today, its more better to steadily going up than the irritating changes and movement during before the halving. It is shocking when you see the market on the exchange moves in seconds and really not follow the technical or more normal movement. For just an hour or even 20minutes you can see how bitcoin go back to its high price upon going down a 500$ fall. Imagine how hype and manipulations has been done. Well we can assume that miners are pissed of and selling already their asset due to halving but whales are really wise to play with it.