Curdog
For this position to be valid, your assertion/premise that others are unaffected by a transaction by two persons must be true...which, sadly, it is not.
For example, if one produces widgets at a cost of $1 and sells them to customers for $1.50 this pricing will affect another person whose cost to produce the same widget is $10.
Essentially, supply and demand economic systems stem from the consequences of other peoples transactions on you.
Well...... the topic was the price of gold, and I introduced dogs into the discussion, so I can't chastise you for bringing in "widgets".
I will point out that only those folks having a need for widgets are affected by the price of them, and it is presumed that those with a need for them will actually take possession of them.
My larger point is that a "theoretical" supply of gold works as well as a real supply at the point where it impacts ordinary folks, and it takes a peculiar form of self-involvement to get all worked up over it.