Where do the world's wealthiest people live? Well, it depends on whether you're deliberating over millionaires, multi-millionaires or billionaires.

If you're on a “fat-cat” hunt, London is described by London-based wealth consultancy, WealthInsight, as the city with the highest number of multi-millionaires, defined as individuals with over $30 million each, according to the Daily Mail on Saturday.

London is well-known for being a playground for wealthy foreigners, particularly wealthy Arabs, in the weeks surrounding the Islamic holy month of Ramadan with articles about the latest supercar-seizure in the news each week.

Gulf 'supercars' in London

There are more than 4,000 individuals with more than £20 million (about $31 million) per head, placing London ahead of Tokyo, Singapore and New York as the one of the wealthiest cities in the world.

The English capital has become a hotspot for luxury cars, super-prime homes and outlandishly dressed visitors that flock to areas dominated by foreign wealth.

Just a few weeks ago, the former prime minister of Qatar, whose family owns a large share of luxury One Hyde Park apartment complex among other properties said he would retire to London rather than his homeland, stated the Daily Mail.

Arab millionaires have been in Britain since the oil crisis of the mid-1970s, settling in Mayfair and the home of Harrods, Knightsbridge,  a popular shopping destination for Arabs in London.

The number of millionaires and their wealth have grown relentlessly, expanding with the ever-rising price of energy. This is reflected in their appetite for London and its exclusive postcodes.

Outlandish requests documented by the Daily Mail include orders for 1,000 pink roses to be delivered from Saudi Arabia to Southampton for a dutiful student girlfriend, a four-month camel milk supply for a lactose-intolerant child and a gold-plated BlackBerry smartphone.

Speaking at the G20 Summit last week, Vladimir Putin described Britain as “a small island.” Nobody, said his spokesman, pays attention to it – except of course the Russian “oligarchs who have bought Chelsea.”

Did he hit the nail on the head? Nobody pays attention, and so the discreetly and ridiculously rich continue to descend on London.