Bitcoin's origin, how the BTC blockchain works, the 21M fixed supply, halvings, wallets, and how to exchange Bitcoin in 2026.
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How Ethereum differs from Bitcoin, what smart contracts enable, the Merge, gas fees, ERC-20 tokens, DeFi, and NFTs — all explained.
How USDT, USDC, and DAI work, what backs them, the risks of de-pegging, and when to use stablecoins for payments or trading.