Did you see that current price increase in ETH ? Many people say that ADA or DOT will replace ETH but this will never happen. ADA and DOT technology may be better in some way but no one can replace the decentralized nature of ETH. ETH has been there since 2017 with smart contracts and we are yet to see how smart contracts will work on ADA or DOT.
The full smart contract capability will come to Cardano in August this year and those smart contract are allotted to be a hell of a lot more economically effective than those ones run on Ethereum. ETH should be ashamed of his smart contracts. Regarding decentralized nature, isn't that how ADA works?