The most important reason for Ethereum's success is that Ethereum's smart contract adopts Turing complete technology, which makes the function of smart contract very powerful, and gives birth to popular application innovations such as ICO, defi, NFT, gamefi, etc.I think bitcoin has not changed and may not need to change. Bitcoin is concerned by the state, and Ethereum is a cryptocurrency that cryptocurrency players must buy.
I'm just a feeling of myself. I don't mean to offend anyone.
"Dynamic" and "better" are different words. If you think bitcoin is better than you are free to believe that. However ethereum is certainly a lot more dynamic, it has changes, the biggest change of eth 2.0 is still long way to go, but we are at least talking about it. There are constantly newer and newer things trying to be implemented on ethereum. That is a proof that eth blockchain is more dynamic because there are more changes and all that. Bitcoin blockchain by most part stays unchanged, sure there has been few changes since its conception, but it has been very slow and very rare.
This is why I honestly believe that there is going to be some sort of continuation of that in the future as well. We will always see bitcoin stay nearly the same and rarely ever change, whereas ethereum constantly adding new stuff to make it more dynamic.