Well, it depends on why you're investing. Are you investing in a good company or are you investing because ZEN shares are "trading sardines"? Whilst I'm disappointed by the decline in SP and the massive selloff, I'm comforted by the fact that this is a good company doing the right things.
In the short term, we probably will see even more volatility due to the massive bearish sentiment surrounding ZEN. In the long term though, I see a bright future as long as they continue to execute.