I see ZEC as one of three anoncoins which might ultimately come out on top--it'll be DASH, XMR, or ZEC. While each could logically fill a separate niche, it's logical to expect one to dominate the other two. I think the best strategy is to diversify your investment. Unless you have strong feelings about any one of those three projects, just take what you're thinking of putting into ZEC and put it into all 3 proportional to their respective market caps (which serves as a proxy for the croudsourced opinion of their intrinsic value).