How can you possible know the number of people in any category since lots of people can easily have more than 1 wallet? 

But I agree with the trend showing more and more Bitcoins being amassed by the top group as they have the money to reinvest in mining equipment and to actively trade, which further raises their stake and wealth in Bitcoin.  The exact wealth effect as any other fiat.

I am very curious about iXcoin, which is merge mined with bitcon.  Is there any way you can do the same analysis on IXC?

I think it's the most evenly distributed coin out there.  My theory is based on the fact that IXC has been merge mined, and thus hard to get, for over 2 years.  And it also had very low interest from the public as it had a bad rap over a measly 2.5% premine so most people thought the coin was either a scam or that it died.

But now, since thousands of people merge mine and since 80% of the total 21 million coins have been mined, it's too late for anyone to really get a huge chunk, like a 10%. 

So my theory is that iXcoin has yet one more huge benefit over Bitcoin, in that it is incredibly evenly distributed so when it goes up, many many people will benefit from it, unlike the few hundred that did well when BTC shot up for the very first time.

So I'd appreciate it if you could do a similar distribution Analysis for iXcoin.  And you should buy a few thousand IXC because a massive relaunch is planned within a month. 

Thanks and good luck!