Ethereum is better than bitcoin because Ethereum serves as a place for running decentralized apps and thus it is serving the businesses but bitcoin is a currency, so investing in Ethereum would be of huge benefit. Ethereum is one of the largest cryptocurrencies in the world after Bitcoin. And I want you to notice that Ethereum has been growing much faster than Bitcoin.
I, don't think ethereum can be more demand by bitcoin because as far as I know bitcoin is the most higher prices right now in where it difficult to defeat by any coin due to the popularity and the one they mold as a single currency in future.
yes, Bitcoin is a giant in the crypto world and now a benchmark for all coins so its position is very strong, I think Ethereum haya will be able to occupy the second position after Bitcoin in the future.