ZCoin has been launched without any hype or fanfare, and it's still a very new currency - even if the technology on which it's built upon is very advanced, thus some volatility had to be expected unless you've been living under a rock. The devs are working around the clock in order to resolve the small issues that have arisen - so small in fact that as far as the community knows they have affected a grand total of 1 (one) user. Talk about mountans made out of molehills.
ZCoin is one of the most interesting and solid cryptocurrencies of the year, and it's set in stone that it won't do anything but rise.