Would Quark Coin ever come up / gain value?
Sure. It might go down too. It also might become worthless. What information exactly do you want to glean from this thread?
Is it worth keeping / holding Quarks?
Any answer to these questions is pure speculation, but I doubt most of these alt coins are worth holding. You might make a bit, you might lose a bit, nobody can give you a definite answer, you need to make that decision yourself.