DeFi, or decentralized finance, replaces traditional intermediaries like banks by using blockchain-based protocols to let users borrow, lend, trade and earn interest directly. It grants full control and access without approvals or counterparties, but transfers responsibility for security and custody—loss of private keys means loss of funds. The space enables a wide range of financial activities (spend, save, invest, collect) faster and more flexibly than legacy systems, though it requires users to do their own research and manage risks. The video summarizes these points quickly and emphasizes practical entry via a crypto wallet.
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