All Ponzi schemes topple eventually - Robert Reich page 
> Glass-Steagall’s larger purpose was to put an end to the giant Ponzi scheme that had overtaken the American economy in the 1920s and led to the Great Crash of 1929. > Americans had been getting rich by speculating on shares of stock and various sorts of exotica (roughly analogous to crypto). These risky assets’ values rose solely because a growing number of investors put money into them. > But at some point, Ponzi schemes topple of their own weight. When the toppling occurred in 1929, it plunged the nation and the world into a Great Depression. The Glass-Steagall Act was a means of restoring stability. > But by the 1980s, America forgot the financial trauma of 1929.