There is more and less equal distribution (look for "Gini index"), but 8% of the global wealth in a single wallet is beyond bizarre.
And how would this guy earned this stash? Mining with his private multi-terahash pool for a couple of years? Selling drugs on a massive scale?
This is a ponzi and probably a scam too.
8% of the "global wealth" in a single wallet (at least for a single currency) is quite common in the real world. Ask Warren Buffet, or Bill Gates.
As for how he got the coins, it's been noted, multiple times, in multiple articles and threads, that you opted not to read before posting, that he was a miner in 2009 and 2010 when the difficulty was quite low and there were not many miners. Easily could have amassed that amount of BTC back then, with only moderate GPUs (heck, you could find blocks using CPUs back then). So let's see 7200 coins / day production, 600 coins / day, that'd only be 6 weeks if he finds only 12 of the 144 blocks per day.
Just because it's hard today, doesn't mean it's always been hard, Mr. Chicken Little.
And I'm not sure what you're referring to as a "Ponzi" and "probably a scam". If you mean Bitcoins, then you clearly do not understand how the network works, at all, and are not even familiar with how a Ponzi scheme works.
Links for your personal enlightenment and in the hopes you will one day post something with some merit:
https://en.bitcoin.it/wiki/Introductionhttp://en.wikipedia.org/wiki/Ponzi_schemePlease do everyone a favor and become educated, at least a little, before posting.