Bottom Line Up Front: In a single metaphor tucked into his 1994 Berkshire Hathaway (BRK.B) (BRK.A) shareholder letter, then-CEO Warren Buffett explained a core idea that still separates long-term capital builders from short-term speculators: owning a piece of something extraordinary beats owning all of something mediocre. When Buffett wrote that it is “far better to own a significant portion of the Hope Diamond than 100% of a rhinestone,” he wasn’t just talking about portfolio construction: he was explainin ...