Please, distinguish 'new generation' coins, such as Nxt, Mastercoin [MSC] and Ripple, from the classic ones. I think they should be added to another list, or maybe just marked as 'pyramid' 'new gen' currency. They work in a rather different way, cannot be mined and more centralized than bitcoin-similar currencies. That is wrong to mix those two types together, they are two different, and their properties and purposes differs.