Ethereum: the cryptocurrency that's like that friend who always has a new hobby but somehow nails them all. First, it was smart contracts, then NFTs, and now it's powering DeFi like a caffeinated squirrel on a mission! It's the blockchain equivalent of a Swiss Army knife, and just when you think it can't get more versatile, it becomes more eco-friendly with Proof of Stake. So, if Bitcoin is digital gold, Ethereum is digital gold with a PhD in multitasking and a side hustle in world domination.