Gold remains our best means of economic measurement. It is not a perfect, but it is our best. Due to its monetary properties, gold can be used to measure wealth across generations.
It is often reported that governments and central banks have for years leased or sold their gold to bullion banks; therefore, they are unlikely to possess the tons of gold, they are said hold. Also, the bullion banks seem to be under enormous pressure recently. Just look at the recently reported spike in the gold coverage ratio on COMEX, with, there being over 200 ounces of paper gold claims for every ounce of deliverable gold (as reported on zerohedge.com)
It is scary to think that a debt of about half of all the estimated world gold reserves has been amassed in 7 years.