Ethereum is the biggest competitor to bitcoin.
Ethereum is the beginning of smart contract technology.

Ethereum is the start of the NFT revolution.
But Ethereum also has many limitations, the solution to which is the Shanghai Upgrade. 

Shanghai Hard Fork is important 

     The situation of Ethereum has changed due to the formation of PoS after Merge, now Ethereum hodlers can earn income by staking. But neither the speed of Ethereum transaction has increased, nor the fee has decreased, on the contrary, stakers cannot unstake Ethereum. The solution is the Shanghai Upgrade. 

Sepolia is done, Goerli is the reason

    The Sepolia testnet has successfully simulated withdrawal of staking Ethereum, but the core developers have decided that the Goerli testnet needs to be simulated as final before rolling it out to the mainnet for the Shanghai hard fork.

Beware of fake Tokens

There are already many fake tokens in the market that are pumped just because they are launched under the names of Ethereum's testnets. Those are scams; rugpulling will happen anytime.