Okay... paper gold is a form of credit. So, by selling a claim I own on gold, somehow I'm expressing that I want to hold onto my physical? How does that work? Aren't the lenders having their locked up assets returned to a liquid position, thus raising physical supply?
Passing a claim on to the next trader is a hot potato scenario. Redeeming those claims for physical would be like a bank calling in outstanding loans.
Any other asset would simply stick the holder with an item that would have to be traded, i.e. less liquid. Gold is effectively cash when other forms of money fail to maintain that purpose.
While the dollar still works fine for the average person, it is not for kings (institutional class entities). Gold is returning to a metric of value among the largest pools of wealth, and therefore increased liquidity.
Edit: corrected hot potato reference.