We keep hearing stories of (not so) rich people hiding their money, off shore accounts etc.
No doubt the ultra rich can hide it even better. Probably a few people off books that have clicked over the trillion.
There are not "a few people" secretly hiding more than twice as much as Musk AND Bezos combined, ffs.
Not unless you include non-private individuals like royalty - whose access to public and private money is identical.
??