Bitcoin is at the top because it started in 2009. Therefore, it was the first to market, and it got the first-mover advantage. However, Ethereum also has its advantage but only in the Ethereum smart contract space.
In addition, Bitcoin has been getting nearly all the press, the memes, and the capital since it started. But with the decentralized finance (DeFi) revolution underway, Ethereum is beginning to see its moment in the spotlight.
While crypto YouTuber says:
Source: Cryptocurrency - investing.com