This then gives a smaller number of people bigger ammounts of power to act on the market.
Bitcoin is in an extreme situation where at the moment half the available bitcoin are in hands of a (on a global scale) small group of people.
I think that this will be a serious problem for bitcoin in the future, but others have disagreed.

I have seen similar threads on that subject. I haven't completely decided yet, but I am finding myself agreeing more with those who say people will sell BTC as the value rises and it gains more popularity. I don't think BTC was ever designed to do away with the rich vs. poor divide. But, and this is what I like most about it, it takes the monetary power away from government with their printing presses. And, without monetary power, government is mostly impotent.
This is how I imagine it.