It doesn't just involve ethics and morality but investment risk. The fact that "Satoshi" controls 500k to 1.2 million coins is definitely something to consider from an investment risk perspective and should cause a bit of alarm. Bitcoins distribution ratio is not as good as many fiat currencies at the moment and this should make many investors skeptical and concerned. These concerns should be much greater with many alts including NXT.
Right, but I was talking about traders, not investors. Maybe it's better to call them gamblers? They are more important for coin popularity than investors because provide liquidity.