That adds health care to the list of industries Bezos has a significant investment in, along with technology, retail, media and aerospace. Considering Amazon’s massive scope and reach, this is hardly a surprising group of categories, but the companies Bezos owns make for a uniquely diverse collection.

He helped start rocket maker Blue Origin in 2000, and said late last year that he would be selling “about a billion (dollars) a year of Amazon stock” to fund the aerospace venture. Blue Origin had its first successful test flight in 2015 and is expected to charge $300,000 per ticket to space in the future.

Bezos also owns The Washington Post, which he bought in 2013 for $250 million (apparently without having negotiated a price nor analyzing the publication’s performance), and invests in myriad smaller businesses through his venture fund, Bezos Expeditions. The latter has backed companies ranging from Google, AirBnb, Twitter, ZocDoc, MakerBot and Workday to Business Insider, the Breakthrough Energy Coalition and Juno Therapeutics, which makes cancer biopharmaceuticals.

The man is also an active philanthropist, having most recently donated $33 million to the Dreamers scholarship program with his wife, MacKenzie. The Bezos foundation, established by his parents, Jackie and Mike, focuses on charitable programs that seek to “elevate the field of education and improve life outcomes for children.”

Other superrich people make similar financial decisions, too — this is by no means an unusual or isolated phenomenon. One person who immediately jumps to mind is Bill Gates, from…