According to WealthInsight’s World City Millionaire Rankings Report 2013, Tokyo is home to more millionaires than any other city in the world, followed by New York and London. But interestingly, a different pattern emerges if you look at the cities with the most multi-millionaires or billionaires. Dubai, often associated with extreme wealth and opulence, only just make it into the top 20 billionaire list and is nowhere to be found in the top 20 millionaires or multi-millionaires. And in Mexico City, where an estimated 40% of the population live below the poverty line, there are in fact more than 100,000 millionaires.