And day after day price of Zcash fall down. It's very bad that in zcash market there isn't short position.

I have one advice for holders who mining and holding: sell this coin, or you will regret for your choice when Zcash will fall to 15 dollars.
It will get another negative trend soon. the miner still dumps the coin and I think it will equal with xmr. Or it will be useless coin in the future and Komodo is much better than ZEC. based on his development results.
Why are you looking at it on a per coin basis, instead of market cap? ZCash is valued at way below XMR on a marketcap basis. So saying it will become in line with XMR after a dump is meaningless.