Pegged to stable assets (like USD), stablecoins (USDT, USDC, DAI - often on Ethereum) provide crucial price stability within volatile crypto markets. They facilitate trading, serve as DeFi collateral, enable remittances, and act as a primary entry point (on-ramp) for users entering the Bitcoin, ETH, and wider Web3 ecosystem.
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Meme coins start as jokes but gain traction via community hype. Risks: No utility = high volatility. Pump-and-dump schemes. Some evolve (e.g., Dogecoin’s payments use case), but most are speculative.
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Blockchain aids sustainability: Carbon credits: Tokenized offsets (Toucan Protocol). Supply chains: Track ethical sourcing (Provenance). Energy grids: Peer-to-peer trading (Power Ledger). Critique: PoW energy use. Shift to PoS (Ethereum) reduces 99%+ emissions.
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