NOBODY in the world can't say the exact number of it, as long as the EARTH is still alive the resources are being reproduce yearly, although it is finite still we can't say its true value.

And in terms of fiat, BLACK MARKETS can also make money through their own devices, that's why we certainly can't tell how much money do we have here. It's not just the banks who are producing things like these but there are also some people who are corrupt and don't want to lose to anyone when it comes to high number of money.