Generate a full detail guide for owners of traditional businesses on the practical implications of Web3 and blockchain as of 2025. The guide must be a simple, hype-free explainer. It should include: 1. A clear definition of blockchain, Web3, and NFTs. 2. A section on potential use cases beyond cryptocurrency, such as NFT-based loyalty programs, supply chain transparency, and decentralized autonomous organizations (DAOs). 3. A balanced look at the current opportunities and significant risks. Please include a disclaimer that this is an emerging and volatile field.