Faced with declining city budgets, harsh future COVID lockdowns, and more riots, many residents and business owners in America's core cities will likely decide the cities aren't worth the trouble anymore.
After the Great War, Austrian cities and towns began issuing their own money. The Germans tried something similar, but without the voluntary and decentralized aspects of the Austrian model. German disaster ensued.
Contrary to what many modern economists say, increased saving is not a problem for the economy. The real problem stems from declines in production and saving, and these often result from central banks' monetary policy.