Ethereum came to offer a solution for initital coin offering and nothing more, while bitcoin came to offer a way to be a store of value.
It's much different and I think that if you believe that ICOs are the future you should put your money in Ethereum.
On the other hand, if you think that the world needs a way to store funds then your choice would be bitcoin.

Personally I think that the hype around Ethereum ICOs has been stopped and the demand for ICOs has been just decreasing, so in this case I would go with bitcoin, for the long run I think that bitcoin is going to overcome all the coins as it's system is much more stable, and it has been around for much longer.