I do believe ETH has the potential to do it.
From a first approach, if never heard about crypto, and just trying to compare both of them, you would put your money on ETH.
I started a few months ago, and after reading a bit about both, ETH is the real deal.
But who knows, so far BTC just kept on growing and growing.
Maybe in a near future.
There might be something to that. They actually call it the flipening. That's the day that Ethereum over takes bitcoin in terms of market cap. Ethereum has quite a few high potential use-cases. Although Bitcoins' store-of-value and first mover advantage will be difficult to over come, in a few years from now ETH has the best chance.