Because most major trends in the crypto market have to rely on the Ethereum blockchain. From ICO to Defi, NFT, most of them are tokens and projects launched on this blockchain. With such a large number of projects, ETH will remain the top 1 altcoin for a long time.
We do know that Ethereum is still the best to be the king of altcoins and that cannot be denied, it is true that many companies are still using Ethereum-based blockchain, which is why Ethereum is still strong today in all major markets, but BnB / (Binance ) which we know also have the same system as Ethereum, many big companies that use the BnB Blockchain base, Binance also has the number one exchange in the world, and it seems that Ethereum or Binance has the same power, it could be that in the future Binance will replace Ethereum , Nothing is impossible..