I mean, I haven’t looked at all the data and whatnot but I imagine there are people who have millions of dollars that earned it honestly, 200 million is a lot but again I bet there are non horrible people that have that much
The reason people use 1 billion as an example is there is no good way to earn that much money, no one has ethically earned 1 billion dollars in any example I’ve ever seen at least, so it’s a good baseline
After googling I am fairly confident that it is in fact a word!