I don't think it's over yet maybe ethereum can fall to the price of 30 $ - 50 $ this year, maybe ethereum will lose its third place at the end of the year or at the beginning of the year because I think stellar is now better than ethereum.
The difference in the market share of Ethereum and Stellar is still very large. I don't think Ethereum can fall to the fourth place replaced by Stellar.
Ethereum still has potential to develop, and Vitalik Buterin still has confidence that Ethereum will have a new life after the success of the Ethereum 2.0 project
I can't speculate much at this time, because the price of Altcoin continues to fall, so we wait until the beginning of 2019 and determine who can survive and who will be replaced on the coinmarketcap list.