They already make gazillions of dollars in foreign currencies by selling ads around the world. Historically they have been TOO diversified out of USD with no way to repatriate that money without getting taxed by the US on it.
It already went to $5500 in January, this isn't such an outlandish claim.
The only real way to stop the gold bull run is to recover trust in the USD, which will likely not happen until midterms (if they happen). Even if the USD recovers its trust, it will be tepid and people will still be cautious af.