Watch the video.

And in addition to learning how forks can work where ETFs (who do not own Bitcoin but hold it in custody on behalf of the investors who paid for the bitcoin) explicitly control how they respond to any fork, consider how a ban on private custody along the lines of Order 6102 is far more effective the more institutional custody is in place prior to such an Order being made.

It was in large part because most people held their gold via banks that Order 6102 was so successful.