Nothing. I think he really knows what he is talking about.

Never heard such a clear explanation of the underlying problems with cryptocoins.

Quark faces a lot of problems much like other cryptocoins do.

Quark pretends to have solved a lot of those problems, but that is simply not the case.

But that doesn't mean that other coins are "better"...

it just means that no one has yet found the ultimate coin, and it is still an arms race to create the one supercoin that really has more security, stability and fair distribution.