I want to define ethereum for you from my point of view. Imagine before the blockchain network, all the projects were focused on space, which was still under the supervision of a main body and organization, ethereum with smart contracts that it offers, new projects with the help of this technology can their system Set up on a blockchain space without much knowledge of this space. We can easily create custom tokens in ethereum and that's great.
Recently, the transaction fee in this network has increased for ETH currency and all its tokens, which is one of the evils of this network.
The ethereum algorithm is more robust than bitcoin, and I generally prefer long-term investment in ETH to BTC.