"Centrally controlled" is not the same thing as one guy who has a very large stake.
Bitcoin, by definition, is not "centrally controlled." It doesn't matter how many coins any entity controls, there's nothing that it could do to actually break the system or remove the inherent value of bitcoin. The fact that there are thousands and thousands of miners and nodes around the world protecting the ledger (the blockchain) is what makes bitcoin so groundbreaking.
