Investment maestro Warren Buffett once offered his wealth-building wisdom for the upper class. Buffett advises the upper class on strategies to further grow their wealth. Representing only about 2% of the U.S. adult population, this group has a median household income of $256,900. Buffett’s guidance includes the practice of value investing, a strategy that involves picking stocks that are priced at or below their intrinsic value. Buffett underscored the significance of long-term investment and cautioned ...