Billionaires by country, who tops the list and where does Africa stand? While some countries have hundreds of billionaires, others have less than 10 or even none. You can tell how prosperous a country is by the number of billionaires living in the country. It means the infrastructure and facilities needed to get wealthy are available in the country, and it’s a land where dreams come true. Here are 5 countries with the most billionaires in the world, according to Forbes:1. United StatesWith 813 people, the U.S. has the highest number of billionaires among its citizens ($5.7 trillion). Americans…