In my opinion, there is no guarantee that after the Bitcoin halving, the price will always go up, it's been 2 halvings, the price of Bitcoin has always increased and reached new ATH...
Of course, there can be no guarantees in cryptocurrency. It is possible that the increase in the price of bitcoin will occur later, but there should be no doubt that the price will rise, since the increase in the number of coins on the market will slow down. If by that time the demand for BTC also increases, then this will further contribute to the price increase.