If we talk about big coins, then I think ETH was the one which remained pretty much stable during the crypto crash. It kept on fighting to be near that $1k mark. Now I am thinking about keeping more of my crypto funds in ETH rather than Bitcoin. Bitcoin is way too volatile...
How can you mention Bitcoin when the topic is about the best performing alts, Bitcoin is not an alt.
Anyway I agree with you as you said that ethereum is one of the best performing alts, way down lower but recovers fast and approaches to 1k$, it is not new to us, since etheruem is the most demand crypto-currency on earth, 50% of all transaction is coming from ethereum blockchain alone.