I&#x27;m sure you&#x27;re referring to his macro ideas, but this is a fun coincidence as I was reading about his Castle-in-the-Air theory of investment[1] last night.<p>[1]: <a href="http:&#x2F;&#x2F;finance.wikia.com&#x2F;wiki&#x2F;Castle-in-the-Air_Theory" rel="nofollow">http:&#x2F;&#x2F;finance.wikia.com&#x2F;wiki&#x2F;Castle-in-the-Air_Theory</a>