It’s not a zero sum game but I think maybe we’re using the term millionaires differently.

When I, and most people I presume, use millionaires in casual conversation the reference is to being wealthier than most of society. It’s not usually meant as precisely having at least a million dollars since inflation has made that not a lot of money already since the colloquial use of the term millionaires first came about.

If you mean literally having a million dollars than we can probably just wait 50 years and even the destitute will be able to scrounge around for that much change.

Probably much sooner than 50 years, but yeah. If you mean filthy rich I think that takes a combination of work skill and luck that's hard for most people to achieve.

That being said, you don't need to be filthy rich to live a good life. There's the perspective that it's all mindset of course, but barring that you don't need to be filthy rich to go see F1 races for example. I've been to some when I was nearly broke. Obviously no Grand Prix grandstands but it's still achievable for the average person.