Earlier quoted context omitted.
Its not just a belief. The ratio is something in the region of 100x. Its also not just a precious metal thing, most markets function that way due to long and short positions. The paper market is always quite a lot larger then the actual one.
[[citation needed]]
Which doesn't mean ETFs like GLD are not real. It just means that if I say I'll bet you the price goes up, we settle the bet at $100 for each dollar the price moves, that is independent of us actually owning any gold.