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.
Same audit he and many others can make for bitcoin, litecoin or whatever. In every coin existed right now you will find something that could be better, something that seems not right etc.
And another big fact to mention - this is all decentralized!! People (WE) decide what to buy for long term, what to pump, which to dump which to hold right now etc. We are the living organizm together that has its moods not necessarily consistent with the facts.
We have no ideal coin yet and without a monarchy or tyranny we will not have one coin that is "the best" in all.
That is why we just have to have a few main coins not one. Next year we will have a coins championship and this will be an interesting competition

Blood will flow.