Wow diff is already up to 0.84 !! Pretty high for a PoS coin. This coin is going to become harder and harder to PoS mine overtime because of the expansion of the money supply. And as such, block sizes will need to be increased, potentially to the point that you will have to hit the max reward if you want a timely stake.
And this will influence interest rate limiting money supply and thus controlling inflation and exponential growth. It means that early adopters will benefit from compounding while the diff is low but when it rises they can nevertheless have a good income because of the size of their staking holdings. At this stage the network will be secured enough to be used by merchants who can be interested in staking too.
