The 1929 stock market collapse was an accurate reflection of real-world economic conditions, it wasn't a panic crash and it didn't cause the great depression. There are a ton of theories about why the depression happened but pretty much none of them claim fiddling with the stock market rules would have helped anything.
Stock prices during the depression were reasonable, they were just news nobody wanted to hear.
Economists also think that WWII ended the depression.
As if flattening the major cities of every developed country except the U.S. and spending the majority of the world's economic activity on objects whose sole purpose is to destroy and be destroyed. That brought prosperity.
