I really don't know why people are arguing about impossibles? we the re*ards should follow the mr big snip here, NO we shouldn't.
Who is taking our wealth? pools are very well distributed geographically and hash power wise, the first 6M bitcoins were mined by less than 10 people and the second 6M were mined by less than 1000 people and the third part which are 4.3ish M coins are being mined by millions.
Only 4M bitcoins are actively circulating in the system, however I agree there are some people/ agencies/ organizations accumulating secretly and slowly because they know about the secret, the big secret of bitcoin which I will not disclose here