It is difficult to determine which one is better for investing either on bitcoin or ethereum, but in my opinion it depends on the money you have and how much profit you want to make, for me Bitcoin is no choice. 1 as an investment because Bitcoin has a good market interest and promising investment options, but ethereum is no less good than bitcoin, because ether has its own enthusiasts and a good predicate on the market and seen so far eth able to survive amid unpredictable market price, for me it's good for you to invest in both, because you know which one is better and gives you more profit.