Question

The prosperity of the "boom years"

Answer 1

Perhaps, you are talking about the prosperity of the "boom years" which led to the lavish lifestyle of the rich which was the cause of the collapse of the Wall Street Stock Market. The 1929 Wall Street Stock Crash which is also known as the Black Tuesday was mainly because of how 16 million dollars worth of shares were traded in one single day. This was too much for the New York Stock Exchange.