Bitcoin's decentralization promotes the fairness of global currencies and protects its holders from inflation.
Bitcoin does not achieve global wealth equality. It will only benefit those who are really rich or the rich who buy it, and make the rich who have the funds to buy more Bitcoins become richer.
Bitcoin can only increase wealth when bought and left for longer period of time to appreciate more before selling it. Bitcoin is an asset not a tool for equality program or plans. It does not equalize wealth or balance the wealth of the rich to that of an average man. The potential in Bitcoin is to increase the value of one asset according to size and time in which this is done.
If the rich put more funds in Bitcoin meaning they'll gonna make more money that one who put lesser amount. It's a money doubling asset that requires holding for a certain period of time before selling it.