The number of high net worth individuals in the world is increasing. Fewer of them have inherited wealth and more of them are entrepreneurs and business owners. The world has "shrunk." They are increasingly mobile, increasingly multinational, and they're looking for more than just tax shelters.
If you'd like to better understand who's buying where and why, Barclay's recent research report Wealth Insights: The Rise of the Global Citizen? (PDF) provides some interesting insights into the increasingly multinational lifestyles of the affluent.
As Barclay's puts it, "The Rise of the Global Citizen? report aims to explore the mobility of today’s wealthiest individuals, and to assess whether their choices of where to live, work, study, retire, invest and donate wealth are indicative of an increasingly international group. It also looks at key trends in the make-up of high net worth individuals, and how these are impacting mobility, financial planning, identity and philanthropic behaviour."
Check it out. It's worth a read.