You have to realize that some will buy bitcoin at a $100k price and even more, bitcoin is gaining mainstream adoption, and individuals, companies, and institutions are buying huge into Bitcoin.
I agree with this because if bitcoin finally reaches $100k this year or next year, while people believe that bitcoin will not stop increase, they will still buy bitcoin, no matter how much the price is.
Even if they can not buy a lot of bitcoin, they can still buy bitcoin by a small amount and hold it, and they can buy it back again if the price is down.
That is what happens if bitcoin is going to mainstream and the mass adoption comes, and that makes people want to buy bitcoin because they can see the benefit of bitcoin for them.
So if the companies, institutions, or even people buy bitcoin in a huge amount, they do not want to late to use the time to buy bitcoin before the price does not yet increase so high.