Should investors follow Buffett's lead in hunkering down?Warren Buffett steps down as CEO of Berkshire Hathaway (BRK.A 0.50%) (BRK.B 0.44%) in less than two months. Don't expect any stock market predictions from the legendary investor during his remaining time at the helm of the huge conglomerate. That's not his style.However, Buffett's actions often speak louder than his words. And what he's doing -- and not doing -- could be worrisome to many investors. Here are three signs that Buffett might be bracing f ...