Not only is it possible, but there are many people who make that much in a single day, let alone an entire year. Last year alone, for example, Warren Buffet made $14 billion. On an average year, Gates brings in $11 billion... and he's technically retired.
So how do people make that much? Generally they do it by either being born into an incredibly wealthy family (aka. the Waltons who own Wamart), or they own stock in massively successful businesses (aka. Bill Gates), or they head massively successful companies (aka. Kim Kardashian).
The most likely route for a person to take is the 'Kim Kardashian' route, where you create an incredibly successful market through enormous marketing of yourself... aka. You turn your own image and name into a brand. You should keep in mind though that regardless of what you might think of people like the Kardashians, they're actually fairly brilliant at self-marketing and work incredibly hard. So it's not like that wealth comes easy, but it does come.