And currency can't all end up in the hands of the power-law distributed savers. It also has to be continuously debased so that spenders can spend. Savers and spenders are symbiotic.
In NXT there are plans to implement Monetary System that will allow to create currencies (both PoS and PoW) on top of NXT that should gain additional value compared to NXT coins. This is supposed to work as an anti-deflation mechanism and help stakeholders diversify and distribute their stakes when they see more value in those currencies.
There are also incentives for stakeholders to invest in successful enterprises running on NXT Asset Exchange, because shares of successful companies can appreciate faster than NXT coins. Debts can also be settled in shares of enterprises, not just in NXT coins.
Both of these mechanisms are supposed to help with distribution and fight centralization of stakes. I guess it will take a few years before we find out if it worked
