900% within a couple of weeks is an optimistic prediction to say the least But why not? I would take it
I figure Monero and Dash are over $1,000,000,000 market cap so PIVX must be worth at least $1,000,000,000. Actually more than Monero because it has a proven Governance system. And more than Dash because it has true anonymity (zerocoin protocol).
So yes conservatively $17.50 each which would give it a $1,000,000,000 market cap.
From that point of view you might be right but there could also be other factors which the market values differently it seems. With market caps of those sizes I doubt the market is completely off. Do you think you analysis is sufficient? To be honest I don't know .PIVX is absolutely great no doubt about that.