本质就是美国的经济长期发展，好过世界上其它任何一个国家。过去200+年的历史，一直验证这是对的。
巴菲特强调过：
"In its brief 232 years of existence ... there has been no incubator for unleashing human potential like America," Buffett remarked in an annual shareholder's letter. "Despite some severe interruptions, our country's economic progress has been breathtaking. Our unwavering conclusion: Never bet against America." -- W. Buffett
巴菲特在年度股东信中指出：“在短短的 232 年历史中……没有一个国家像美国一样，能够释放人类的潜力。尽管经历了一些严重的干扰，但我们国家的经济进步令人惊叹。我们坚定不移的结论是：永远不要看空美国。”
