I did some calculations based on marketcap.
If zeitcoin reaches the same marketcap as vertcoin, darkcoin, ... which is a realistic target, it will probably be around 10x more worth, so 20 satoshi. This is in the near future a reasonable target.
If zeitcoin goes very popular and reaches marketcap of dogecoin, then we already talk about a price of 100 satoshi. This will of course not be for the short term.
Marketcap Litecoin: zeitcoin = 1000 statochi, marketcap bitcoin: zeitcoin = 20000 satoshi.
What makes you say this is realistic to reach same marketcap as darkcoin?
Question is more what does these coins offer more. In principle different algorithm, but mining is not really connected to trading. You only need to have people believe in it. We have a good community, so this is realistic.