I'm afraid the 30mil was misinformation. According to http://agran.net/bc_getbalance.php?top=100, the top addresses hold 40,973,569.05. That's worse distribution than the ~39mil I posted last week. (You can see that easily in my tiny post history.)
well it depends on how much is held in exchanges.
there was over 3500 btc traded on minpal alone which is about 10 million blackcoin.
Across all exchanges you could probably assume that there is between 10-15 million on exchanges.
Stop sweating who owns what wealth currency coins is always going to b top heavy
The Wealth Distribution
In the United States, wealth is highly concentrated in a relatively few hands. As of 2010, the top 1% of households (the upper class) owned 35.4% of all privately held wealth, and the next 19% (the managerial, professional, and small business stratum) had 53.5%, which means that just 20% of the people owned a remarkable 89%, leaving only 11% of the wealth for the bottom 80% (wage and salary workers). In terms of financial wealth (total net worth minus the value of one's home), the top 1% of households had an even greater share: 42.1%. Table 2 and Figure 1 present further details, drawn from the careful work of economist Edward N. Wolff at New York University (2012).
http://www2.ucsc.edu/whorulesamerica/power/wealth.html