With a POS wallet, where does the interest come from? If it's just coming from the POS hashing creating a flow of coins by generating new money supply, well this is doomed to fail.
where does the interest come from? It's the key question.
The POS coin as PPC and BC can't answer such questions.
Such coins just as perpetual motion, they don't need any imput, but with continuous output.
No one pay the interest.
Yes such coins will definitely is doomed to fail.
But there are another type of POS coins, such as NXT and qora. There is no interest in such coins.
in PPC the interest you get comes from "minting" of coins. its the same as mining coins, but the more coins you keep in your wallet, the more coins you "mint" every month. i believe ppc is a hybrid pow and pos coin.