To do this, Biden should won guest of all and this is a non-trivial task (even according to current calculations, it is not clear who will win).
Besides, who needs a weak economy? Yes, even if the dollar is the strongest currency in the solar system - what good will it be to the Issuer if the economy inside the country is at the level of South Africa or some other non-existent Wakanda?
The President should first of all be interested in the economy of his country and not in the strength of his currency in the international arena. Especially at this difficult time.