They are working with physical cash, nobody of those who are trading with bitcoin futures are using real bitcoins

that is why a lot of people are just buying those contracts instead of buying a bitcoin directly from an exchange, in fact, it is more noob-friendly for those who does not even know how to buy.


And the CME futures are going to work by the same way, they all are going to be working with cash.

it just works as a loan, just by the same way, only that you are purchasing futures