I don't think it's wise to ask such questions because half or replies will be pure speculation and the other will not be honest (people will promote the coin in which their own funds are) so I just warn you to take all opinions with giant grain of salt. You should be able to make your own decision.

I'll be one of the second group (as I'm involved only in BTC mining) and will say: THE BITCOIN RULEZ (always was and always will).
I have some ETH as well and consider it as great coin with lot of great features the BTC is no. 1 for me.