Assuming 10 billion humans all using the tech, and 10 year amortizing, and zero operating cost, that requires $30 per user. Not sure if that number acounts for

Assuming 10 billion humans all using the tech, and 10 year amortizing, and zero operating cost, that requires $30 per user. Not sure if that number acounts for interests either. Yeah, the author could have used "when" instead of "if". The most realistic success scenario would be rampant inflation eating the debt.