That’s a lot of gold.
Also a lot of space. I’m guessing that you could dig most anywhere and find gold if you got something to measure it in parts per trillion.
Same as any gold mine - it is only profitable if you can find it in concentrations compared to the expense. I think it needs to be some fraction of an ounce per ton of waste rock to make a mine worthwhile.
Not buying it. The heavy metals would’ve been disbursed very thinly. I would guess the leftover remnants of a nearby supernova.
Yeah.
$771 Trillion Worth Of Gold Lies Hidden In The Ocean: Good Luck Getting It
Also, if you could get even a fraction out, it’s value would drop to not much.