That would be 4.5-13.5 billion marketcap. Not gonna happen anytime soon.
if iota works as expected, 15Billions is possible in less than 2 year
Your math is wrong and oriented to ETH Marketcap,, If iota works how its supposed to be, than you can expect much more than 15b in 2 years, much much more, but thats only my opinion. And let me add, even ETH will be much higher than 30billion in two years.