You missed the fact that IOTA is launched for almost 2years.
You know about something now don't means that it exist since yet.
There was a time when IOTA was really cheap...
well, yes, but was not possible to buy them easily over an exchanger,
bitcoin hit exchangers having 1-2$ price or less, not at 40$
Oh, it was!
http://iotaprice.com/Your math is not wrong, but you cant compare IOTA with Bitcoin.
Bitcoin was the pioneer tech at a time where nothing else existed as a vision and a small network.
These days all crypto tech is walking on roads already build.
So current markets and infrastructure is not comparable with early 2008/2009 days...