In my honest opinion I do not think this is possible. Because many people are investing in bitcoin so as bitcoin value depends in supply and demand so if the banksters and governments hold 90% of the supply the value will increase making a lot of people very rich.
what if i told you that there is a high chance that an exchange you use or a merchant gateway or a hardware wallet or even a software wallet can be tied back to a single company with some ownership stake in your coin holding/using solution.. see post above for hints(link provided in previous post)