If we assume half of the earths population will eventually have bitcoin and we evenly spread all 21 million coins between 3.5 billion people than everyone would have 0.006 bitcoin.
I have no idea how much money everyone has on average (it will vary greatly between countries, in the US the average net wealth per adult is about $244k, while in Polans it's more like $20k and in african countries it's probably even much less).
But anyway if you have more than 0.006 bitcoin you're at least above average on a global scale (assuming at least 50% of the world population will eventually use bitcoin).
Not that that does not automatically mean you are wealthy, because even the top 50% is usually not wealthy on a global scale, so to be safe you should probably have more like 10 times that amount at least. But i;d advice to get as many as you can afford to buy without sacrificing too much on your current lifestyle.
Where did you get the figure of $244k net wealth for US adults? That seems ridiculously high to me.. maybe for the white, retired demographic who own their own homes, but for the
average adult, who's paying a mortgage, car loans, and student loans and saves little if anything toward retirement... I've got to call bullshit. Not to mention all the 20 and 30-somethings who still live with mom and dad.
