The world’s wealthiest people have several things in common, but one of the most prominent is that the 10 richest have more than $100 billion to their name. The very top have more than $200 billion. These amounts don’t consist of cash sitting in a bank but are mainly investments, often of some of the largest publicly traded companies , which even the general public can invest in.

These billionaires reached their lofty heights through hard work, great ideas, serendipity and plenty of careful planning with wise financial advisers along the way. Here are the world’s 10 richest people and some of their key investments, according to the Bloomberg Billionaires Index , as of Nov. 13.

1. Elon Musk: $320 billion Elon Musk is one of the most controversial business figures, but what’s not under dispute is his wealth. Born in South Africa, Musk built Tesla into a leading player in the electric vehicle market, and is pushing space travel with his SpaceX venture.

Musk made a small fortune as an early shareholder of PayPal, and more recently purchased Twitter, which he renamed X. Musk has courted controversy in recent years, using drugs during a broadcast interview with top podcaster Joe Rogan and becoming more active politically, besides a range of other political pronouncements on X. 2.

Jeff Bezos: $235 billion As the founder of Amazon , Jeff Bezos became something of a household name in the dot-com boom of 1999-2000, but his wealth really took off after the 2008-2009 financial cr.