There is more gold on earth than there should be :-).
"Electromagnetic observations help support the theory that neutron star mergers contribute to rapid neutron capture (r-process) nucleosynthesis[28]—previously assumed to be associated with supernova explosions—and are therefore the primary source of r-process elements heavier than iron,[1] including gold and platinum.[53] The first identification of r-process elements in a neutron star merger was obtained during a re-analysis of GW170817 spectra.[78] The spectra provided direct proof of strontium production during a neutron star merger. This also provided the most direct proof that neutron stars are made of neutron-rich matter. Since then, several r-process elements have been identified in the ejecta including yttrium,[79] lanthanum and cerium.[80]
Reference:
Our best idea for the “origin of gold” doesn’t add up
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