Bitcoin is Nr.1 crypto in the world, Ethereum is the altcoin, which do not have enough popularity - just check the altcoin using websites. Even Doge is much more popular 
Ethereum was not able to live up to all the hype that was surrounding it
the lack of real developments is reflected on its price now
In terms of adoption you are right, Doge is way more popular but ETH has more speculation going on and more serious companies looking to adopt it
Ethereum does have more innovations than 99% of the altcoins out there and Microsoft Azure implementation might give it a big push forward, though I wouldn't hold my breath for that
BTC will the number 1 for the forseeable future and if ethereum expects to gain the traction it wants, it will have to incorporate BTC as the payment coin and use ETH just as blockchain transaction gas
Any altcoin that is purely trying to replace BTC as the world's cryptocurrency of choice is bound to fail