You'd make a lot of money on the way to doubling the world's supply. 3000 tons annually just doubles how much we mine, not how much we have; that's more like 190,000 tons. And even if you doubled the total supply instantly, you'd now own half the current value of the world's gold, which would be about $6 trillion.
And of course gold has all sorts of really useful properties, so long term, it'd be worthwhile to make it abundant and cheap.
And of course gold has all sorts of really useful properties, so long term, it'd be worthwhile to make it abundant and cheap.