ETH is a great platform when every project is rooted in the ERC20 platform, but to surpass BTC is probably a long way, no matter how strong the demand for that platform is. , because simply BTC is the king of the crypto market.
The OP said that it's about the market cap. and I think it's very possible that ethereum can outperform bitcoin in terms of market cap. currently despite the dip, ethereum is still pretty strong and even they haven't finished updating their technology thoroughly, I'm sure when the time comes ethereum will have a pretty big market cap and maybe on par with bitcoin's market cap