Ah, it's a number that I got in a calculation (for a projected scenario), not a coin that I may or may not have.
TL;DR: too high a price of bitcoin (in the multiple millions) will result in a drastic increase in global millionaire numbers (if hodlers do not sell en masse), which is unlikely, therefore the price in the multiple millions is unlikely.
My calculated upper bound price of btc that does not affect the total number of millionaires too much is about $1mil/btc.
I don't see multi-million BTC as implausible in 2030-2050 and certainly not beyond.
Perhaps, but I was only talking (effectively) about the next 5-10 years, which is a time period where i have the most interest.