21 Million Bitcoins = $21,000,000,000,000 ($21 Trillion USD)
21 trillion, that's still less than the national wealth of china. And much less than the national wealth of the world.
It's not that weird to reach 21 trillion.
Gold has a market cap of 7 trillion, and bitcoin is better than gold.
also, just because you use bitcoin won't make you a millionaire, most people don't own a full bitcoin, and even if bitcoin would reach $1 million it would not create too many millionaires or billionaires.
I calculated that already and compared it to the current amount of millionaires and billionaires in the world, and actually if you assume 1 bitcoin is worth 1 million, you would get almost exactly the amount of millionaires and billionaires as there are in the world.
coincidence? I don't think so.
It's zipfs law right there.
$21 trillion is similar to the US state debt. So it is not a big amount. It is much less than the total wealth.