Here are a few common ways people "buy and earn" with ETH:
1. Buy & Hold (HODL): Buy ETH on an exchange like Binance, Coinbase, or Kraken and hold it in hopes that the price will go up.
2. Staking: Lock your ETH in Ethereum 2.0 staking (or through platforms like Lido or exchanges) to earn staking rewards (typically around 3-5% annual yield).
3. DeFi Platforms: Use ETH in decentralized finance (DeFi) apps to provide liquidity or lend ETH and earn interest (higher risk but potentially higher return).
4. NFTs & Gaming: Use ETH to participate in blockchain games or buy NFTs that can potentially increase in value.