Every one has a price in which they tend to buy Bitcoin. For me personally it is 12 K, if I see Bitcoin below that and have money I see it as a oppurtunity to buy. Though this is not backed by any research, this drives my strategy.
I thought if we could collect all such opinions, we could arrive at a price which everyone thinks as normal. Because if you think about it, all pur personal opinions of Bitcoin increase or decrease the price (Barring instance of manipulations by whales

which we can't do anything about)
Bitcoin increase and decrease in price can not be controlled like what you say, there will never be a normal price because Bitcoin price is always changing every time because it is influenced by various aspects, one of them is the aspect of demand and also the market condition. The more people who believe in using Bitcoin, the more the price increases and when people's trust decreases, the price of Bitcoin will follow the decline. It is a characteristic that we can not get rid of, there is no prediction that can mention the accuracy of Bitcoin prices. All of us are the ones that determine the Bitcoin price, even when bitcoin costs 1 USD or 100,000 USD. Anything can happen because Bitcoin always shows its magic.