In my opinion bitcoin is not comparable to other coins, it has its huge value because its the first crypto, everyone know bitcoin, many less know ether and others cryptos. Tecnically bitcoin is outdated, its slow and it has expensive fees. Ether is much better but its not very known and in the future it will have to fight against all the new smartcontract ready blockchain that are following his road
You do know that Bitcoin has been going on for a decade now and yes it is the first but you do know what smartphone is and what its capable with. Eth might have the price of Bitcoin while it is on a long run because of Bitcoin again. It was inspired and used by bitcoin investors to just try ETH on how much will it grow.