World's richest people made $92 billion in 2014

The The top 400 richest people on Earth own a total of $4 trillion. The richest people made about $100 billion in 2014. Jack Ma, the founder of Alibaba Group Holding Ltd., earned $25 billion in just one year, Bloomberg reports.

Microsoft founder Bill Gates, 50, remains the richest man in the world. His assets exceed $87 billion.