Thank you for the very instructive article. I very often heard the word futures and could not understand what it was. And so, this article woke my curiosity, and I looked in Wikipedia - https://en.wikipedia.org/wiki/Futures_contract.
Here I first learned that this is just a contract, fixed by some kind of asset. In our case it is bitcoin.
After that, I understand that the price of 18.5 thousand dollars is just the beginning of its growth. The very fact that it began to trade on securities exchanges, inspires people its value. Further all by the standard scheme, we believe more in its value - it becomes more valuable.