I guess ETH is back to its pavilion now, nearly it has pumped upto $50 from last week and slowly rocking, Yes it was really struggling this entire last quarter due to continuous price fluctuations. I hope it will regain its position as king of Alts.
The difference between the capitalization of Ethereum and Ripple capitalization is not that big, so I think that for the 2019 Ethereum will return to its place. For me, he was the best altcoin, and remained the best altcoin.