I found it interesting facts about gold production and gold reserves on the planet.
It looks as if we haven't found all the gold yet.
I found this here.
HowStuffWorks "How much gold is there in the world?"
Figuring out the total amount of gold that has been produced by man is a little harder. To get at some kind of estimate, let's figure that the world has been producing gold at 50 million ounces a year for 200 years. That number is probably a little high, but when you figure that the Aztecs and the Egyptians produced a fair amount of gold for a long time, it's probably not too far off. Fifty million ounces * 200 years = 10 billion ounces. Ten billion ounces of gold would fit into a cube roughly 25 meters (about 82 feet) on a side. Consider that the Washington Monument measures 55 feet by 55 feet at its base and is 555 feet tall (17 x 17 x 170 m). That means that if you could somehow gather every scrap of gold that man has ever mined into one place, you could only build about one-third of the Washington Monument.
From:
Gold
It is estimated that the total amount of gold yet to be retrieved from the Earth is 100,000 tons. South Africa is the world’s largest producer of gold and is estimated to have half of these gold resources. Both the United States and Brazil have significant amounts of the world’s gold resources. Approximately one-fifth of the total resources of gold in the world is by-product from copper and silver ores.
In the United States, Alaska and Nevada are the main producers of gold. Nevada produces the majority of the gold produced in all of the United States. The remaining are from placer deposits in Alaska, and other gold deposits in western states. Most of the gold recovered in the United States is recovered by only about 30 mines. The largest gold mines in the United States today are located in northern Nevada.
It looks like there is still plenty to go around. It also looks like we're in the right place to find it.
I think that football sized nugget is still out there and I'm not going to stop looking for it.
Let's go get some.