I don't think cardano will replace ethereum ever, lets be frank here, so many projects out there revolve around ethereum, so many projects that are ethereum l2 also doing airdrop campaign requiring staking of ethereum right now locking billions in their pool, also the EVM that etheruem has is highly utilized across various blockchain whether it is L1 or L2 they always implements EVM with little modification and the fact that so many ethereum L2 are gaining billions valuation for their token alone means something.
meanwhile did you see such thing with cardano? I think not, cardano is lacking behind in this regard, let alone pursuing ethereum which supposedly requires cardano to have higher growth rate than ethereum. funnily enough over the course of this past 6 months cardano only rise double of its bottom, its kinda unrealistic to say that ethereum gonna be overtaken by cardano, its more realistic to say solana have higher chance overtaking ethereum.