Don't be fooled. It's billionaires against everyone else. Even multimillionaires are closer to the everyday person. The working class consists of two groups: those without disposable income (nominally those with "hours" in income), and those with some disposable income (days in income).
If they ain't got a "year" in income, their they're one of us.
How do you make your money? Do you need to make a wage? Or can you let your property (land, buildings, stocks, etc.) be your income?
The real amount doesn't matter, it's whether you have to work to live or not.
If you have to work, you are the working class. If you don't, you are the owner/capitalist class. But your analysis is still somewhat correct: millionaires and small business owners are closer to the working class than billionaires, it does still matter how they make it though.
I think I generally agree, yeah. There's something to be said too for if your money is made by owning or by maintaining. I don't give a shit about landlords who rent shit out and do nothing else, but I think building administrators who fix issues and handle maintenance are probably working class.
Comes back to what you were saying. Do you make money through labor, or through ownership?
It's generally considered safe to withdraw 4% of your nest egg each year. Someone with 2 million can support an 80k/year retirement.
The average multimillionaire is literally just any person with a six figure salary who has been saving for retirement and is nearing retirement. You basically can't retire without at least being a millionaire.
Yeah the big difference is now much it takes to amass that money. If we have a capitalist system, there's nothing wrong with workers saving money to retire with a few million.