As an amusing thought experiment, imagine that Bitcoin is successful and becomes the dominant payment system in use throughout the world. Then the total value of the currency should be equal to the total value of all the wealth in the world. Current estimates of total worldwide household wealth that I have found range from $100 trillion to $300 trillion. With 20 million coins, that gives each coin a value of about $10 million.
But if falls apart at the bolded bit. Just stop there. Anything after that isn't a thought experiment, it's just nonsense. It's pure bullshittery and I hope he would have admitted that if called on it.