I thought this would be an interesting topic for President's Day.This 24/7 Wall St table
lists the estimated net worth of all the US presidents in 2010 dollars. George Washington's net worth was the largest thanks to his Virgina plantation. Real estate was a big factor for many.
It's interesting that Grant "lost his entire fortune when swindled by his investing partner." I remember a PBS documentary on Grant. Near the end of his life he was suffering from throat cancer, and during this time he forced himself to write his memoirs so that his wife would have enough to live on.