What's the essential difference between an NFT and a token like Bitcoin? It's "interchangeable or not." Bitcoin is a fungible token: your 1 BTC and someone else's 1 BTC are identical and swappable one-for-one, like banknotes. An NFT is non-fungible: each has a unique ID and information and can't be swapped at parity, like a certificate with a serial number and ownership record. It's precisely this uniqueness that lets an NFT represent "the ownership of a specific thing" — its value lies not in being exchangeable but in being identifiable and provable: "which one this is, and whose it is."
When I buy an NFT, what do I actually "own"? What you indisputably own is the on-chain "ownership record" — proof that this specific NFT now belongs to you. But that's three different things from "owning the image file" and "owning the image's copyright." Most NFTs' files sit off-chain, with the chain recording only a link pointing to them; copyright, unless explicitly granted, usually stays with the original creator. So more precisely: you buy an on-chain "proof of ownership," not the file itself, and not the copyright. Getting this boundary clear is the first step to understanding an NFT's value and risk.
What are the most common misconceptions about NFTs? Three. First, "buying the image gives copyright" — unless the terms explicitly grant it, copyright usually stays with the creator; you can display and resell that NFT but may not be able to use the image commercially. Second, "the NFT is the image itself" — you own an on-chain record, the file often sits off-chain, and if that storage fails someday, your NFT may not even display the image. Third, "rare = valuable" — rarity is just one condition; real value depends on whether anyone will buy and why; many rare NFTs end up ignored with terrible liquidity.
What should I think through before buying an NFT? Three key questions. One, rights: what does this NFT actually grant — just an ownership record, or usage rights, commercial rights, membership perks? Read the terms before deciding. Two, where the content lives: is the file on-chain (more permanent) or on an off-chain server (with failure risk)? This decides whether your NFT might one day "lose its image." Three, why you're buying: for its actual use (ticket, membership, game asset), or purely betting on appreciation? If the latter, be clear that the NFT market has poor liquidity and high volatility — only commit what you can afford to lose. Think these three through, then decide whether to act.