I've been looking at bitcoin for a few days now and i think it really has potential because of the really solid decentralized protocol it uses. Clearly my understanding is limited at this point, but what has been bothering me is the following... I know that bitcoins are not a pyramid or ponzi scheme in the traditional sense of those words, but what I find really strange is that more than half of all possible bitcoins have been mined already. Of course nowadays a lot of people have heard about bitcoins, but looking at on how many websites you can actually use bitcoin to pay for something I think you can clearly say that it is still in the early adoption phase.
Now suppose bitcoin ever were to become mainstream, this small fraction of early adopters would still hold half of the total bitcoin wealth. Of course early adopters should get rewarded for their foresight/effort and luck, but this to me sounds rather excessive and unwanted.
Was the algorithm specifically designed to act in such a way or where unforseen events that caused this, like slower rate of adoption or too fast growth of mining power?