To make it simple, every coin have 0% change if not all then most is because of some various reasons. Probably the main reason why market stays on 0% is because of the upcoming scaling solution at August 1 of bitcoin, where changes will occur that might result in a big dip so many are converting their stash into bitcoin and at the same time hedging and putting their money back into fiat while some are buying hedging their bitcoin stash to altcoins or buying bitcoins just because it might make profit.