I think Zec has reached its level now, at about the $50-$55 area. I cant really see it dropping to much in price now.
Main thing I can see affecting profitability going forwards I think will be the difficulty.
It has reached its level when they start margin trading.
Only 300-400 btc on buy side, this is going much much lower.
How low do you think?
First, it doesn't matter what I think. Market is all that matters.
Lower than xmr. Much lower. Don't blame me after your bad investments... there must be a speculation thread for zec, go there if you want some deeper analysis.
To be on topic,
200 + 15% would be 230, 300 + 10% would be 330, something to speculate with.