I would agree/disagree because people might trust you more because you are more popular. Then again you might be less approachable to people who think less of themselves. Also people might think that you're perfect even if you're not. Also, they might only treat you for your looks and not brains.
I would say that based on this excerpt and your knowledge of American history, the stock market crash made Americans lose confidence in business because B. people worked diligently to participate in the building of the American dream with the understanding they would profit.
However, when the stock market crash happened, they lost all faith and confidence.