Consider the fact that ether is still underpriced at $1,000 ($100B market cap).Ether should be well over that. Consider the fact that ether handles more transactions than all other blockchains combined!
We are still in the early stages of crypto, Though the price of bitcoin will likely rise as well, but ether seems much more promising to become the crypto crown in the nearest future. Some conservative predictions have ether hitting a 1 trillion market cap by 2020.

I will believe if only etherem price is not affected by bitcoin's price, everytime bitcoin crash all cryptocurrency like ethereum also crashes, it seems ethereum price is also dependent on how Bitcoin performs, and not the other way around.