For your Zcash, if you KYC and all with Gemini then you can probably cash out directly via them. As far as I know Gemini does fiat as well, I have never used them before though. They recently started supporting Zcash.
https://www.ccn.com/zcash-price-spikes-to-345-after-gemini-announces-new-trading-pairs/Otherwise, you can just swap it for another coin and sell that, but I would advise against Eth or BTC. Use litecoin, its much cheaper and you don't need to wait long for it to arrive like with BTC