Ethereum is Web3's programmable engine. Its smart contracts enable DeFi, NFTs, DAOs, and dApps – the core utilities defining the decentralized web. ETH, its native token, fuels transactions and staking. Continuous upgrades (The Merge, rollups) aim for scalability and sustainability, solidifying its central role in building the interactive Web3 future.
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Games like Axie Infinity let players earn crypto/NFTs. Benefits: Income for unbanked populations. True digital asset ownership. Challenges include sustainability and "pay-to-win" critiques. The metaverse will expand P2E opportunities.
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Oracles (e.g., Chainlink) feed real-world data (sports scores, stock prices) to blockchains for use in smart contracts. They enable DeFi price feeds, insurance payouts based on weather, and dynamic NFTs. Decentralized oracles aggregate multiple sources to avoid manipulation. Without oracles, blockchains can’t interact externally—making them critical infrastructure. Use cases expand to cross-chain interoperability and enterprise systems.
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