1. ZCash at launch will have a whole host of competitors (that actually have users, infrastructure built, etc).
2. With the founders reward of 10%, having this be globally accepted and no less a replacement for Bitcoin is ridiculous.
3. Clones. This is a certainty. (If at all people even deem this coin worthy to copy).
Sure, total anonymity is preferred by some and one could say has a niche market. What's wrong with Monero here? ZCash will be a cluster fuck of epic proportions, and anyone that invests in it early on, will be looking to dump the f*** out of it at a slightly higher price. Bag holders, come grab some ZCash.
I do not know if ZCash will succeed or fail, I have taken a look at it and I am neutral on its chances either way.
There does seem to be a lot of interest in it though, and your post here tells me you feel threatened by it in one form or another. Considering it has not even launched yet and people feel they need to preemptively troll it, it must be doing something right...