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.
I also regret I didn't buy couple coins when I've just joined to bitcoin. That was last year ant the price was around 350-400$ per 1 BTC. But I think to make 21 bitcoins is not so big deal. I have heard that there is a company that pays year bonuses to it's workers in bitcoins and there are many options to make bitcoins basically. But at the same time everything in the economy should circle to stay fresh and high. If a million people will decide to start to save bitcoins till 21 point to be one in a million - it's gonna be collapse, for bitcoin for sure.
And which company would that be to pay their employees bonuses in bitcoin?
One of the big tech giants maybe? IBM, Amazon, Apple or any other one that doesn't accept bitcoin as a form of payment. This is usually how these big companies operate by giving their employees things that they do not or can not use. Just look at all those employee giveaways for e.of the.year with massages or hairstylist gift cards. They don't care about those things. Have you ever heard a company giving their employees gold bars for their year end bonuses or e.of the.year awards? Never cause they value those things higher than they do this cryptocurrency they usually do not have the knowledge to know what to do with in the first place.