By the end of 2018 Eos market cap will surpass that of Ethereum. Simply because by June 2018 it will be obvious that Eos is superior tech to Ethereum.
There is 10x Eos coins compared to Ethereum coins. If we assume Ethereum to achieve €1000 by the end of 2018 (ETH is at €800 now), we should have at least €100 for one Eos coin.
I think my assesment is conservative.