Actually, I don't own any altcoins.
I became interested in what I perceived to be a scam (Neucoin)
after reading the claims that Neucoin can solve the Proof
of Stake issues.
I've read quite a bit on these kinds of issues and have
discussed them with very smart and knowledgable
people (like Greg Maxwell).
And I believe I know enough to tell you that the
Neucoin whitepaper is a paper tiger.
And yet, you can't produce any coherent attack against it. Why don't you? I'm sure at least Sunny King from Peercoin would be interested in what you have to say.
been there, done that -- see above link.
As far as I know, Peercoin still uses checkpointing to guard against grinding attacks.
If there was something innovative in the neucoin paper, I'm sure Sunny King and
the peercoin community would be talking about it and trying to integrate it.