300 trillion?
As in:
¥300,000,000,000,000
Which is (roughly, when written)
$3,000,000,000,000.00
Or... Three Trillion Dollars
So, the only companies on the planet that have a market cap of One Trillion Dollars (or more) are:
Apple, Nvidia, Microsoft, Alphabet (Google), Amazon, Taiwan Semiconductor Manufacturing (TSMC), Meta Platforms (Facebook), Saudi Aramco, and Berkshire Hathaway.
That's it.
And all of them, except TSMC and Aramco, are based in the USA. So, we're diving in to some kind of deeply fictional world, here.
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(And, now that I look at the list... all of those, except Berkshire Hathaway, are based on the west coast of the USA; that is kinda crazy to think about.)