On Saturday, Warren Buffett, arguably the world's most closely watched investor, released his highly anticipated annual letter to shareholders.
His hedge fund, $Berkshire Hathaway-A (BRK.A.US)$ , had one of the best performers in 2021. YoY growth 29.6% outperformed $S&P 500 Index (.SPX.US)$ 's 28.7%. And it looked to have an even better 2022 as the Federal Reserve prepares to raise interest rates. 
However, over the last decade, Buff...