I wish i started mining and bying bitcoins back in 2010 like the early adopters.
I was pretty stupid at that time.

I don`t know what`s the point of this "research"?Do you have 21 btc?
I will never have 21 bitcoins.
This post is very useful, it allows to us to see a comparison on the average price as time has passed, in this year alone the amount of money needed to buy those coins has doubled if bitcoin keeps going in this direction it will not be long before it takes an amount of money that is out of the reach of most people in the world.