The reason why promoters make that mistake is that being human they are unwilling to see the end of the boom. Moreover, it is good business to take chances when the possible profit is big enough. The top is never in sight when the vision is vitiated by hope. The average man sees a stock that nobody wanted at twelve dollars or fourteen dollars a share suddenly advance to thirty—which surely is the top—until it rises to fifty. That is absolutely the end of the rise. Then it goes to sixty; to seventy; to seventy-five. It then becomes a certainty that this stock, which a few weeks ago was selling
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