I have checked the richlist recently, some of them are from exchanges. More than 50% of BTC are holding by the top 50 people or so. Can't remember the amount though. 61% BTC is held by 16237 addresses.
I have two question-
1. Exchanges are being the giant although BTC holding by them are from customers. Still it's possible that they are trying to be a controller of the crypto community which is very bad I guess.

2. If top 50 people hold 50% of BTC and BTC becomes the global currency, we may face once again the previous era. Being slaver to certain people.

Think at from the point of macro economy. In my opinion, it's something we need to talk.