Regarding Cantillon, he made money on both the Mississippi and South 
Sea bubbles personally, getting out of France on the day he unloaded 
his holdings, a bit before the peak, but in plenty of time to get in 
on the ground floor of the South Sea one before it really took 
off.  In France he actually had a bank that was selling the market 
short in various ways, pretty tricky.  His observations turned him 
into a strict monetarist and bullionist in order to avoid any such 
shenanigans in the future so that others would not be able to make 
money as he did.

Barkley Rosser