任何人像劉伯伯那樣使用資金做任何生意或投資都是極大概率要破產的，將個人的錯誤的責任推給市場是不理智的思維方式。

From Chapter 20 of Benjamin Graham's book The Intelligent Investor:

"Investment is most intelligent when it is most businesslike. It is amazing to see how many capable businessmen try to operate in Wall Street with complete disregard of all the sound principles through which they have gained success in their own undertakings. Yet every corporate security may best be viewed, in the first instance, as an ownership interest in, or a claim against, a specific business enterprise. And if a person sets out to make profits from security purchases and sales, he is embarking on a business venture of his own, which must be run in accordance with accepted business principles if it is to have a chance of success."