I think opinion cardano will never replace ethereum and so far there are plenty of projects that revolve around ethereum. In fact, almost every investor is encouraged to invest in ethereum after bitcoin. Moreover, the number of investors and millions of profits are available in ethereum. If you want to get good profit from investing in crypto market then feel the need of ethereum.
ethereum is more credible to use compared to cardano, although there are things that make cardano cheaper to use than ethereum, but people still trust ethereum more to use on their projects today. but that does not mean that cardano loses their appeal to attract developers to be able to create their projects on this architecture, but it requires more effort and further development in the cardano ecosystem, just like what solana is doing now.