You can walk across Monaco. Not around it, across it, from the French border on one side to the French border on the other, and it takes about an hour on foot along a route of roughly four kilometers. Somewhere in the middle of that stroll you will have passed through the entire length of [...] The post In Monaco, more than two in every five residents are millionaires — the highest share of any city on Earth, packed into a country smaller than New York’s Central Park. Most residents pay no perso