The most important feature that the digital coins have is that you never have the "we won't do this project, because there is no money"-problem, which was what happened in 1929. There were workers, people wanting to eat, and factories, but no money.
That's not really what happened in 1929, or 1932.
The banks stopped increasing the money supply, did a few tricks (called back margin loans) on the stock market to make it fall faster and probably shorted the entire economy. What's wrong with that? The end result was that normal people were not able to pay with labour for their living expenses.