By Brian O’Connell With U.S. wealth down by $5 trillion, what can investors do to stem the tide? Is the world’s most prosperous nation growing less prosperous? You bet — and by trillions of dollars. According to a new research note from JP Morgan Chase & Co., total U.S. wealth has plummeted by $5 trillion in 2022, down from $13 trillion to $8 trillion, mostly from a sour stock market. But it’s not just about stocks. The U.S. economy, as measured by gross domestic product (GDP), slid by 1.4% during the first quarter of 2022, primarily due to high inflation and a massive U.S. trade deficit. Tha…