according to me it depends on how long you are planning to keep your money invested.
if you are looking for a short span investment you should go with ethereum as bitcoin is currently going through a hard phase and has just started recovering,but in case you are looking for a long term investment plan bitcoin would be your best choice.
I think that for today almost everyone has already made their choice in this or that direction regarding Bitcoin and the etherium. Such instability, demonstrated by bitcoin over the past 2 months, can not be sustained by all investors and traders.