"I’m still surprised that people are still debating on a winning cryptocurrency/blockchain. It should be quite settled that Bitcoin is for digital gold, and Ethereum is a smart contract platform. Calling Bitcoin the winning cryptocurrency is like calling email the wining internet" - @Loi_luu (founder of KyberNetwork)
I total agree with this opinion!
We can only compare somethings that's quite similar.
I agree., both currencies have different use case anyway., so they are different. but talking about their popularity and mass acceptance., i would say that bitcoin still the number 1 which is followed by ethereum. In line with this., both of them are the best investment good for long term. Trading is the best way to make a profit., and in fact everybody does.
In regards to their use case., i agree on your statement., but both of this currencies are recommended., without ethereum there would be no and less tokens and coins exist nowadays.
Have a great day