Gautam Adani, the chairman of Adani Group, is the latest to join the elite $100 billion club as he surpassed Reliance Industries chairman Mukesh Ambani to become India's richest man.

Currently, Elon Musk is on top of the billionaires' chart, followed by Jeff Bezos and Bernard Arnault in the second and third rank according to Bloomberg's Billionaires Index.

Adani added almost $24 billion this year, becoming the world's biggest gainer. His wealth increased by around ₹6,000 crore every week over the last year.

The industrialist now stands at the 10th rank in the index that calculates the world's richest people according to their net worth.

Ambani, on the other hand, was ranked 11th after his net worth, which first topped that benchmark in October, dropped slightly below it to $99 billion, as per the report.

In the last ten years, Indian billionaires have added $700 billion to their cumulative wealth. This is equivalent to Switzerland's GDP and twice the GDP of the United Arab Emirates.

India maintains as the third largest billionaire producing nation in the world, adding to the gigantic rich-poor divide in the country.