Ethereum, the second-largest cryptocurrency, has unique features compared to Bitcoin. Ethereum has no supply limit, making it non-deflationary, unlike Bitcoin. Its block creation time varies from 12 to 18 seconds, faster than Bitcoin's 10 minutes. Ethereum uses Ethash as its security algorithm, distinct from Bitcoin's SHA256. Ethereum's programming language is Turing complete, while Bitcoin's is C++. Ethereum's mining reward dropped from 5 to 3 units per block, unlike Bitcoin's constant 12.5 units. Ethereum has 18 decimals in its division, offering more precision than Bitcoin's. $ETH #notcoin