The only thing that could help buck the trend is ETH 2.0 but who knows when that will actually come to fruition.
Not sure how much demand there is left for Ethereum with how authorities are cracking down on ICO's, and also, there are many more alternatives to choose from nowadays, and they are ready to adopt way more users and growth right now. It will take a looong time for Ethereum to be on par with other utility platforms based on the dev's trackrecord for delaying upgrades.
Once BTC starts to trend upwards people will also regain confidence in alts.
People don't regain their confidence in altcoins, they just know that altcoins go up faster and well more than Bitcoin in terms of cold hard percentages.