Link of the day: How Much Platinum is in the World?
Surprisingly little. The entire platinum mined so far in human existence seems to fit in a cube with a side length of 8 meters. For gold, that would be a cube with about 20m on all side (a surprisingly large portion of that gold is estimated to be owned by small Indian household and was traditionally part of dowry). Platinum on the other hand is more wildly used in conductors, electrodes, and other technical and medical equipment. Platinum, interestingly is also quite a bit cheaper than gold. Currently the price for an ounce is $788 for platinum and $1727 for gold.
Also quite interesting: The history of platinum and its use cases