This article does a little more in depth look at how much it takes to fit into the "Rich" category. It's still not complete, but better than a reductive metric like 7 figure net worth. His final conclusion:
If your net worth is under $2 million and your income is under $600,000, statistically, you're probably not rich—you're upper middle class. And in today's world, that still means you're doing very well.
https://www.benzinga.com/personal-finance/25/05/45483329/are-you-rich-or-just-upper-middle-class-heres-the-net-worth-and-income-it-takes-to-be-considered-wealthy
Are You Rich or Just Upper Middle Class? Here's The Net Worth And Income It Takes To Be Considered Wealthy