Well using this math every time BTCUSD moves $0.01 its costing someone $73K.
Correct!! it's costing the market $73,000 (or increasing the value of holders by an aggregate amount of $73,000)
So looking at mtgox I can move the price up a penny by buying $800 of coins right now. Makes you wonder why no one is doing this. $800 = $70K. Its like a printing press with this new math.
It's not new math, it's how things have been done since the Egyptians and Romans measured their relative Money Supply