Until now, the OKEx was the first futures market, but as they reactivated the withdrawals, the volume just plummeted, so the open interest also, as people sent their coins to other services. Then the CME has grabbed the lead post in the futures market. And the CME is popular among institutional investors, among the big players, because they are a well-regulated US-based company.
The futures markets, and particularly the CME became an important part of the price discovery, and they have a considerable influence on the prices. And as they get more investors, the volume grows and the influence also grows.