When you buy Bitcoin hen the price is 100k$ then how much will you sell it back to make profit because at that time the price of Bitcoin might not exceed 100k$ and if the price didn't not exceed that amount you will become a loser in the business so how does the vendors do at that time?
Or you buy at that time and thinking that it will go up to 200k$ but ironically, the price come below 100k$. What will be you faith/fate. Many companies stopped function last year because they accumulated a lot of Bitcoin when the price was high and they were thinking that the price would go up for them to sell them off and make their profit from there but instead the price of Bitcoin drastically come down very well. So the companies enter bankruptcy and folded. So exchange are trying to avoid such mistakes, so that they can run a long journey.
Will the price pass 100k$ next year 2024 for buys to make their gain?
How can you tell that the price can not exceed $100k? You can't know that for sure. Five years ago, no one would believe that the price of BTC can touch $40k, but it did and even exceeded it. So, you saying that those who will buy at $100k will be making a mistake might be wrong, anything can happen.