Financial forecasters say the world's first trillionaire could amass that fortune within the next 25 years. And they say we already know his name.  

The world's richest person, Bill Gates, is expected to hit the thousand-billion mark by 2039, if his fortune keeps growing at its current rate.  

And the Microsoft founder won't be alone for long. Investment bank Credit Suisse predicts there will be eleven trillionaires within the next 40 years.