A little context:  

‍The world’s 25 wealthiest families, where wealth has been passed down over at least one generation, are now collectively worth a cool $2.1 trillion, according to a new report from Bloomberg.

With first-generation money excluded, the industries on this list of dynasties look quite different to most modern rich lists, which are often dominated by tech entrepreneurs. Indeed, the majority of families listed owe their prosperity to physical, rather than digital, empires. – Chartr

Note the Musk, Bezos, and Gates families are excluded because their wealth was self-made.  Good for them!