Personally, I believe that Bitcoin is more valuable to hold on to for the long run and Ethereum can be used for building applications and minute transactions and I do not count on Ethereum spiking up in Value as the bitcoin did although I might be wrong as people start accepting ethereum due to to its low volatility and its minute computational power requirement for mining.Ethereum has a far better chance of being accepted as a currency norm than bitcoin and that might give it the edge over bitcoin although I wouldnt put all my eggs in the same basket.