The bitcoin is very important for us all and I think that its a very profitable coin, I think its better than Ethereum but that its also a good one.
The bitcoin is way too big and due to that it will also win.
I personally see ETH to be the better one actually. Smart contract is one of the vital feature of ETH in fact a lot of new coins today uses this feature as well and that makes ETH useful while its demand continues to rise as well due to it.
The only advantage of Bitcoin is that it is widely used by lots of users.