Ethereum basically cannot surpass Bitcoin because Bitcoin has a very important role in this market and will never succumb to any altcoins available in this market.
Definitely, so let us stop thinking that ETH will surpass bitcoin one day because this is unlike to happen.
However, anything can happen if Ethereum proves valuable because this market always has enough time to do so. Of course it will take a lot of things, but the possibility of Ethereum becoming number one is very low.
If ETH will get the number 1 spot and bitcoin will dump, this market will dump as well. .I don't know I can't imagine if that will happen, maybe that would already result to the end of the crypto space.