The rich countries are holding onto their wealth, and even expanding it, though at a slower pace.

FORBES: Economies Of Brazil & UK Show How Poor Get Rich Slowly

But by holding so much of their wealth in one company, workers are taking too much risk in one position, she warns.

FORBES

Japan's Masayoshi Son, the founder of Softbank, an internet holding company, has seen his wealth contract by 71% in the past year.

FORBES: Billionaires

Barclays says the UK's Serious Fraud Office has started an investigation into payments between the bank and Qatar Holding LLC, part of sovereign wealth fund Qatar Investment Authority.

BBC: Barclays faces SFO investigation

In August last year, the UK's Serious Fraud Office said it had started an investigation into commercial arrangements between the bank and Qatar Holding LLC, part of sovereign wealth fund Qatar Investment Authority.

BBC: Barclays misled shareholders about source of ?3bn

But holding a portion of one's wealth in a basket of foreign currencies is advisable, he says, as a portion of one's consumption over time comes from foreign goods produced both in developed and emerging markets.

WSJ: The Allure of Emerging-Markets Bonds

Glencore had raised its offer after its first bid was opposed by key Xstrata shareholders, including Qatar Holding, the Gulf state's sovereign wealth fund.

BBC: Xstrata board backs Glencore merger

The central bank had just decided to surprise everyone by holding interest rates steady and a Macquarie Bank wealth adviser was live on television to analyze the news.

FORBES: The Banker, the Model, and the Campaign to Save Dave

According to Birmingham's annual reports, he has other interests in energy, property and water companies (he has a clothing holding, too), but little else is known about how he amassed wealth.

FORBES: Magazine Article