A no coiners fair share is 5$ worth of btc?

Another thread got me thinking. I'm probably wrong so I'd love to hear from the more mathematically and bitcoin savvy out there.

If we assume only 1.9 million bitcoin remain up for grabs and the rest are being held to some degree, then my thinking is that on mass adoption, the population of the world who own mobile phones would be the holders of bitcoin. There's roughly 6.9 billion smart phone users so each mobile phone users fair share of bitcoin would be roughly 0.00027btc. Around 5$ each. I know the math will be way off but even at a rough guess it means every holder of bitcoin right now is already wealthy even if you only hold a couple of hundred dollars worth.