ether has a large user base. many ICOs are built on ether. it is the basis of altcoins. In the long run, it is worth investing. Bitcoin is also a good choice.
Indeed, if we talk about the two coins between bitcoin and ethereum I think we don't need to doubt anymore because both coins are promising and if we invest in bitcoin or ethereum we can get big profits
Both can get us good profits. But the bitcoin could rise more as it has more users.