It's a blind guess...
Russia's former largest foreign investor: Putin is worth $200 billion
Hedge fund manager Bill Browder, once the largest foreign investor in Russia, estimates Russian President Vladimir Putin's wealth at $200 billion — which would make him by far the richest man in the world. When asked to estimate his net worth by Fareed Zakaria of CNN, Browder said: "I believe that it is $200 billion. "After 14 years in power of Russia, and the amount of money that the country has made, and the amount of money that hasn't been spent on schools and roads and hospitals and so on — all that money is in property, Swiss bank accounts, shares, [and] hedge funds managed for Putin and his cronies." ... (full story)