There was hype about Zcash for sure. But it has been beaten down badly and now it is getting stabilized. I think this is the time to start mining it and if you are looking to buy into it, then I suggest you to wait till January as by then you should be able to get it for much better rates. By then, the slow start period would have ended and supply will be more.
The market capitalization of Zcash seems to be on an upward trend, although the price seems to be slowly declining. I doubt if buying it as an investment is prudent, given that not enough cash seems to be coming into the system to maintain Zcash's price. Miners seem to be selling coins at a lower and lower price.
If you look carefully, the current market cap is essentially made up of two "pumps" of about $4 million, one at the very beginning, and one a few weeks ago.