Certainly, halving helps with the increase of BTC price, but let's not forget that the technique is still moving forward and every few months on market show up new, stronger miners. We don't known what power will have processors in two years.
The less bitcoins that’s being mined, the more the value seems to go up and with the manner and speed that people are mining bitcoins it’s goong to be very scarce and we all know that the scarcity of an item, the more it’s value goes up.
it is partly coincidence because the halvings (less bitcoin being mined) happens with the constant growth of demand and it is in fact the demand that is pushing the price up not the supply (mined coin and how much of it).
in other words bitcoin is not going to be scarcer because of halving. supply is constantly growing so there is more bitcoin every 10 minutes on average!