Should You Follow Buffett's Energy Strategy Into 2021?

For decades, Berkshire Hathaway (NYSE:BRK.B) chairman and CEO Warren Buffett maintained a pretty conservative approach to investing, only buying shares of businesses he was well acquainted with. As such, Buffett avoided tech and energy stocks before finally pulling the trigger on PetroChina Co. (NYSE:PTR) in 2002 and Apple Inc. (NASDAQ:AAPL) in 2011. The Oracle's foray into energy and tech initially paid off after he realized a tidy $3.5B profit on PetroChina while his $90 billion Apple stake now represents a ridiculous 20% of Berkshire Hathaway's…