Billionaire Toys For Sale

Courtesy Chateau de Farcheville

Edra Blixseth

Chateau de Farcheville, a medieval French castle
Price tag: $57 million
Edra and her ex-husband, ex-billionaire Timothy Blixseth, co-founded the now-bankrupt Yellowstone Club. Edra is hoping to raise cash with the sale of her castle, the Chateau de Farcheville outside of Paris. The medieval castle was built in 1304 and comes with a moat, personal hunting grounds, 15 bedrooms, 1,125 acres of land and a helicopter pad. It's also available for rentals at $24,000 a night.

Billionaire Who Made Billions More.

James Simons

Net worth: $8 billion
Gain: $2.5 billion
Ex-mathematician's Medallion Fund reportedly up 80% last year. The MIT grad uses complex algorithms to exploit tiny inefficiencies in stock market.

Siapa Akan Menjadi Bilioner Akan Datang....

John Paulson

  Net worth: $6 billion

    Gain: $3 billion

    Hedge fund manager suspected back in 2005 that the U.S. economy was headed for a nosedive. In 2007, personally pocketed $3.5 billion shorting subprime credit, windfall believed to be largest one-year payday in Wall Street history. Last year, his Paulson Advantage fund rose 38% while the S&P 500 sank 39%.

Billionaire Who Made Billions More.

Net worth: $16 billion
Gain: $4.5 billion
The year's biggest gainer is New York City's mayor, whose net worth climbed 28% in the past 12 months because of a revaluation of his financial data outfit, Bloomberg LP. Last July, he bought a 20% stake in the firm he founded in 1982 from cash-strapped Merrill Lynch for $4.5 billion and increased his ownership stake to 88%. Back in the fall he was even richer, worth $20 billion.