It would make even more sense to buy vericoin, stake 3% and mine verium on top of that. Well, I guess it was beside the point.
Vrc = 50 cent
Do the same math tricks, adjust for a mcap that is 15 mill usd
And you can achieve the same with less capital.
Blackcoin is a fork of Peercoin
Vericoin is a fork of Blackcoin
Both of those are proof-of-stake coins, copied from the original Peercoin source code.
More coins (3%) isn't necessarily good. There was Netcoin for instance, that was 45% year interest. When you get too much interest, people sell them all and now Netcoin is worthless.
Peercoin is the original proof-of-stake coin written by the original programmer.