Date
Sep 13, 2022
Fungible Assets: Common and easily interchangeable (examples: Bitcoin, US Dollars)
Non-Fungible Assets: Unique and not easily interchangeable (examples: NFTs, a rare watch)
Semi-Fungible Assets: Can be both fungible and non-fungible depending on certain conditions during their lifecycle
Semi-Fungible Assets Example: A ticket to the last concert by a famous band can be exchanged for another ticket (fungible) until it is used, then it becomes a piece of memorabilia (non-fungible) that has a level of uniqueness and value
Semi-fungible assets are most commonly used in games where in-game currency or clan membership has to be fungible, but rare collectibles or weapons have to be non-fungible
Further reading: https://eips.ethereum.org/EIPS/eip-3525