Pricing and liquidity
A fungible token has one price and continuous liquidity in a pool. An NFT has a last sale, a floor price and an asking price, which are three different numbers that frequently disagree.
There is no pool you can sell into at a known price. Selling requires a buyer for that specific item, which can take a long time or never happen.
What is actually stored on-chain
Usually a token ID, an owner, and a URI pointing to metadata. The image and attributes often live off-chain, on centralised storage or a content-addressed network that still requires someone to keep hosting it.
If the metadata host disappears, the token persists and the content does not. Fully on-chain NFTs exist and are the exception.
Royalties followed a similar path. They were widely described as enforced by the token, when in practice most were honoured voluntarily by marketplaces, and when venues stopped honouring them the revenue simply stopped. What a standard guarantees and what the market does are separate questions.
Standards and wallet behaviour
Fungible tokens follow a simple transfer and approval model. NFT standards add per-item approvals and an approve-for-all permission that grants control over your entire collection in one signature.
Approve-for-all is the mechanism behind most NFT drains, and it is requested routinely by marketplaces. Review it the way you would review an unlimited token approval.
Valuation is a different discipline
Fungible tokens can be valued against supply, flows and comparable assets. NFT value rests on provenance, rarity within a collection, and demand for that collection — closer to collectibles than to securities.
FBT Swap handles fungible token swaps across its supported networks. It does not trade or value NFTs, and it takes no position on what any item is worth.