I see that the discussion has been broken up by examples of fruits, miners and the Halving event, among others.
First of all, I mentioned it in recent days, you may know absolutely nothing about bitcoin, as in this case, perhaps!, but you pose your question incorrectly, that is, the short answer is supply and demand. Spot!
OP, you question a "thing", that you should known..., in fact, it is something empirical, that is, you learn without going to school; it is, supply and demand determines the price of any "thing."
Then, your doubt begins for not understanding these basic principles that apply to everyday life and that in a way is the best example ever, of how to learn about bitcoin.
How do you want to learn about bitcoin if you don't master other basic concepts, which are sometimes general culture or traditional academic training to deal with other knowledge..
If you want to learn about bitcoin, you must have an "academic" or empirical basis that allows you to understand that natural correlation between supply and demand.
Then, supply and/or demand is a variable that intrinsically depends on the niche where it operates, bitcoin, like any other "thing" that is bought and sold, is affected by different factors that make the supply and demand variables, affect the price.
So, almost always these variables, supply and demand, are based on situations intrinsic to them, e.g.; Supply remains the same,(1) demand grows, then )supply falls therefore demand remains the (2) same or (3)grows.
Now, unlike those traditional "things", bitcoint maintains a limited production, that is, "21 million" and it is that same fact which makes it attractive, but the intrinsic laws of supply and demand "punish" it and make it go through that volatility that affects its price, not only upwards but also downwards.
imho.
Read about supply and demand, then you can understand which factors affect the price of bitcoin in the short, medium and long term.
Those factors that affect the price may not be constant or the same always, but if there is a correlation between them, perhaps you should start with the basic concepts, below is a link, then look for documentation that will help you applied to the bitcoin case, in our forum you will find You can learn a lot about the subject, but reading it is not understanding it, you have to study it, and what you learned will surely change tomorrow.
https://en.wikipedia.org/wiki/Supply_and_demand