Its not about who is the first. BTC isn't even the first coin even created. But its true ETH is technologically better than BTC it has a direct use over to what it will do to its network and so ETH is much useful for this aspect. It is however not going to be what the merchants are looking for when it comes to storing the value of their wealth and I guess its about popularity and the limited coin to which more than a million of the coin were lost forever.
As we know that many decentralized applications and crypto trades are based on the Blockchain of the Ethereum. I can just think about Bitcoin as a venture and have no other application. Also, on the off chance that, at some point, Bitcoin ruins itself, at that point the Ethereum won't experience the will effects of this. Right?