According to Wikipedia, the United States of America is the world's wealthiest country. However, I feel there is no wealthiest country. There are many wealthy countries across the world including the United Kingdom, the Republic of Ireland, Norway, Sweden, Finland, Denmark, Germany, Austria, France, Spain, Italy, Canada, Libya, Israel, Saudi Arabia, the United Arab Emirates, Qatar, Oman, Bahrain, Japan, Australia and New Zealand.
The United States is the world's wealthiest country in terms of gross domestic product. In terms of GDP per capita, Luxembourg is the world's wealthiest country.
Saudi Arabia is the wealthiest country in the middle east.
Bill Gates - 54 Billion
Saudi Arabia is
australia
Yes Italy is the 5th wealthiest country on the European continent.
Germany is a country, your question makes no sense.
Germany is the wealthiest country in Europe.
Space colonization or interstellar travel. Making money.
Brunei,Saudi Arabia,Japan and Singapore are the wealthiest in all of Asia!
spain
Costa Rica.