You missed the "total wealth of U.S. billionaires". The billionaires own a tiny fraction of total US wealth. Most of the wealth is owned by people like me, who own a house, and stocks in retirement account.
However billionaires don’t own tiny part of US wealth, more like 5%-10%. And top 1% (and grandparent was talking about rich people) own 1/3 of US wealth.
The top 1% have a lot more, but the cutoff for that is $11 million, and that includes home equity, family farms, etc. The bulk of those people are retired professionals and small business owners. For example, 4% of 75-79 year olds are in the top 1% of wealth. These are rich people, but not the kind of rich that AOC is talking about taxing.
I’m a huge supporter of taxing upper middle class people, but we should just tax them instead of playing games about wealth. The top 5%, that is people making above $260,000 a year, have an income of $5.6 trillion a year. They only pay $1.3 trillion in income taxes. Just double that.