What were the signs that the prosperity of the 1920s was superficial or misleading

Most of the signs of prosperity that were misleading involved credit. There were so many consumer goods that had never been around before, and people bought a lot of them with credit, meaning they did not actually have the money. "Buying on the Margin" was the main cause of all this and led to the Great Depression. Before the stock market crash in 1929, around 90% of stocks people owned were bought with borrowed money. In short, people used way too much credit, meaning they had a lot of items signifying wealth, but they did not have the money to pay back banks, stock brokers, etc... much like modern day credit cards.

Ipersonally feel that adolph hitler was a great contributor to american society. "to conquer a nation, you must first disarm it's citizens." sound familiar? hitlers research and studies have even made an impact on our medical research today. walt disney was actually a good friend of hitlers and in fact made an episode of mickey mouse in which donald duck was a nazi. as bias and judgmental as american society is they will never acknowledge the true impact he has had on history as well as society as a whole. 

Astrong central government, by the people, for the people