We likely need some term that is between millionnaire and billionnaire, anyhow because through inflation of the dollar, it has become a bit too easy to become a millionnaire, but it does not mean the same that it did 20 years ago. With the inflation of recent times, maybe having $10 million in wealth would have a bit more of a meaningful significance as compared with the mere millionnaire status.
Finally, I do understand the point about not every millionnaire or whatever can have a whole bitcoin, but it still remains a bit of a silly point to me... because there are a lot of things that not everyone can have and it becomes a kind of so what, even if it is making a point about upside price potential of BTC when we already have some folks hoarding 100s or even thousands of coins, and other folks with a much smaller means, of course, struggling to build up their bitcoin holdings to even one coin (I doubt that all of those strugglers are teenagers, too)
Good writeup.
Few points in addition:
1. In US, you have to have $6.8 mil to be in 1% by wealth, $400000-500000/year household salary to be that in salary department.
However, worldwide, your household has to make just above $32000 to be in 1% world-wide, but in US you would be below average (average is $52K).
2. having $1 mil in liquid assets in US is nice, but it would definitely not make you rich by any stretch of imagination.
3. reddit has an interesting blurb about push in establishing "crime of unexplained wealth". I can only imagine how difficult it would be to "explain" your wealth if bitcoin is over 40K, which is very realistic. People with even small incomes could have large gains if they bought early and even $920 is early if it goes to 40K within 5-10 years. Paradoxically, I really hope for 1099-B like forms as long as they are accurate (this would be critical).