The world's 10 richest people in 2016 had a combined net worth of under $600 billion — less than Elon Musk is worth today

Alphabet cofounders Sergey Brin (left) and Larry Page (middle), and Amazon founder Jeff Bezos.

Lionel Hahn/Getty Images/Elijah Nouvelage/Remo Casilli/REUTERS

• The world's richest people have seen their personal fortunes soar since 2016.
• The top 10 were together worth under $600 billion a decade ago, compared to $2.6 trillion today.
• Philanthropists Bill Gates and Warren Buffett have slid from first and third place to 17th and 10th.

A lot has changed since 2016...