Not possible.  This would crash the stock markets and put the US into a depression the likes of which are hard to imagine.  Unemployment at 90%, complete lawlessness.  It just can't happen.

They could try to do this to bitcoin exclusively though.  I've been waiting for this to happen for years. 

 Just like it is not possible to close everyone at home for months and months and force vaccines?

Just like it is not possible to have a senile man pretending to be the president? 

 Those things are completely possible