|Ethereum is the second most popular coin by market cap after bitcoin.|
It was created by Vatlik Buterin in 2017 and it's mostly known for supporting Smart Contracts.
A smart contract is a piece of code that executes automatically when some event occurs. It can't be changed.
The ticker symbol is ETH or ETH-USD.
There is a Ethereum Yellow Paper that can be viewed to learn more about it.
It is considered the best altcoin as any coin that isn't bitcoin is an altcoin.
It currently has problems with Gas Fees. These are transaction fees to trade and ETH based token. The fees I've seen have been anywhere from $50 to $500