Money talks, especially in Hong Kong. Cash gives you the keys to this city. We have the world’s most expensive housing and the highest density of Rolls-Royce cars per capita. Some 515,000 citizens (around 7% of the population) are classed as multimillionaires. Last September, eager punters splurged HK$1.38 billion (a mere US$177 million, folks) on the opening day of the horse racing season. MORE.