The owner of the NBA's NJ Nets LOST his 53Milliion $ house deposit
and just shrugged it off.
According to the reporter, he is a "nickel magnate." That means he buys and sells the metal, nickel. He also dealt in palladium and gold. According to Wiki, he is the 7th richest man in Russia.
he also said it was $530,000,000 for the entire estate. That's why it was the most expensive house in the world. The $53 million that was lost was apparently a 10% down payment. $53 million is nothing these days for the super rich. An apartment was recently sold in New York for more than $90 million.