Most surface deposits on Earth started out as meteor strikes, and over time the meteor rusted away releasing the gold which then began scattering.
Comet strikes are different but they too bring in some gold.
No one has ever mined Mars and the Iron Catastrophe that occurred on early Earth didn't happen there. That means that all the gold to ever hit Mars is probably lying about on or near the surface in relatively easily mined quantities.
Those folks investing in gold for its long term value are going to lose their shirts the second we have inexpensive space travel!
“Those folks investing in gold for its long term value are going to lose their shirts the second we have inexpensive space travel!”
That’s true, but by then the dollar will have lost another 99% of its value!