Foundation matters, Bitcoin has it most-solid, it created the idea, without Bitcoin, no cryptocurrency. Who dares belittle Bitcoin with Ethereum again? Only a fool, 2025 is not 2021. In 2021, also before then, you would hear it loud that Ethereum will beat Bitcoin one day, yes in their dreams. 
Bitcoin broke the 2021 ATH [$69k] in 03/2024 to reached $73,850, recorded a new height in 11/2024 [$108k], finally the current ATH≈$110k.
What did Ethereum? Nothing, it has been lazy.
The ATH of 2021 [$4,870] is still holding in 2025. 
ethereum depends on its technology to get big but smart contract blockchain keep appearing, meanwhile bitcoin is just bitcoin and people buy bitcoin because it's the first crypto ever making it legitimate in the eyes of investor even government that right now plan about strategic bitcoin reserve is coming up.Bitcoin broke the 2021 ATH [$69k] in 03/2024 to reached $73,850, recorded a new height in 11/2024 [$108k], finally the current ATH≈$110k.
What did Ethereum? Nothing, it has been lazy.
The ATH of 2021 [$4,870] is still holding in 2025. I always expect altcoin like ethereum to not be able to keep up, because technology grow, eventually altcoin will get replaced by newer one, but bitcoin is like gold.
just see in the future maybe the next cycle you'd find crypto market cap rank getting dominated by a coin you would never heard of before.