What practice in large part caused the stock market crash, sparking the great depression of the 1930s?
a.
banks purchasing a combination of stocks, bonds, and land investments with deposits
b.
people overspeculating on stocks, using borrowed money that they couldn't repay
c.
people buying one stock and selling it the same day, called "day trading"
d.
government investing the taxes it collected in the stock market

Can you summarize this? it takes time and caution to perfect anything which must be concealed. it takes time to crush men who are pursuing legitimate trade. but one of mr. rockefeller’s most impressive characteristics is patience. there never was a more patient man, or one who could dare more while he waited. the folly of hurrying, the folly of discouragement, for one who would succeed, went hand in hand. everything must be ready before he acted, but while you wait you must prepare, must think, work. "you must put in, if you would take out." his instinct for the money opportunity in things was amazing, his perception of the value of seizing this or that particular invention, plant, market, was unerring.