They supposedly could nail the price of bitcoin to the floor.
But it gets exponentially harder to keep a ball underwater the further down it goes.

And what will the market do when it sees bitcoin spike?
you got your 10¢ contract... and now should be paid $1000.
People on the other end cannot pay that.
Not without having the FED be directly connected.
So, a lot of it is going to go unpaid, rather quickly.

And then the price of bitcoin goes nuts.