First off, you can't expect that a business will show a planned amount of income. Especially over fairly long period, such as three years. Second, Polybius tokens will not have fixed price after ICO completes, nor they will necessarily amount to 20M in quantity.

Bottom line - nothing about your initial post "calculation" is particularly sound. It might be so as you have "calculated". It might be not. As usual with ICOs, there's an extreme amount of uncertainty and risks here.

PS: Polybius has a business model that's a good deal "traditional" - a bank, registered and legalized as such. It would be far-fetched to expect an extreme growth rate from such a business, even if they'll be successful. You shouldn't expect growth rates such as >100% per year here.