One of the core features that missing in BTC is privacy. Zcash might be able to fix this issue and reach mass adoption, and if succeed, price will skyrocket.
Zcash could be in demand on all decentralized exchanges to hide "buying and selling power". Actually there are too many use-cases for it and I think that privacy coins will be in great demand in coming months, years.
Recently, Zcash got delisted from few exchanges due to the ban on privacy coins. Although we should not read the actual news, but think as to why such news are given to us )))
It seems like big boys are trying retail traders to sell ZCASH at a bargain price, and once that is achieved... well you know what will happen.
I've looked at all top altcoins and hardly find any sell signals if any. Most are giving a strong buy, and through out this week it has only increased.
This leads me to conclusion that altseason has just begun!
Obviously I might be wrong and we yet to see how far, if at all, price will rise.
However, in the long term, my choice is "privacy" and I go with Zcash. (Not monero or dash for certain reasons, although they could be top gainers in coming years as well)