Berkshire took a new stake in Citigroup ( C 1.88%) in 2022 and the stock currently makes up 1.5% of Berkshire's portfolio. Citigroup has far and away been the worst-performing large U.S. bank stock since the Great Recession and many investors have ditched the stock out of frustration.

Investors often turn to Warren Buffett for advice for one good reason: He's proven his ability to navigate any investing waters -- from moments of euphoria to the doldrums -- and win over time. Buffett doesn't rush to buy the hottest stocks as markets soar and doesn't panic-sell during difficult periods.

Warren Buffett is one of the most popular, quotable investors in the world. The billionaire CEO of Berkshire Hathaway has a legendary investment track record, trouncing the return of the S&P

Buffett -- as well as his late great partner Charlie Munger -- would recommend avoiding leverage at all costs in your portfolio. Why? Because when the market turns (which it will inevitably do at times), the downside can wipe you out. The levered Nasdaq ETF went into a massive drawdown in 2022, and that was just one year of bad returns.

Think being a billionaire is all luxury and extravagance? Think again. Warren Buffett, one of the richest men alive, might surprise you. Buffett's daughter, Susan, says her dad is just normal. A guy who's not obsessed with his billions.