Time-limited NFT contracts can drive the development of a time-based economy for on-chain content. By embedding expiration or dynamic change mechanisms, these contracts create urgency and scarcity, incentivizing timely engagement and transactions. For instance, ephemeral NFTs (ephNFTs) with predefined lifespans, like event tickets or promotional assets, encourage rapid trading and consumption, fostering a dynamic market. Smart contracts can also trigger metadata updates based on real-world events via oracles, enabling adaptive content that aligns with temporal trends. This programmability enhances user interaction and value creation, as seen in use cases like time-sensitive digital collectibles or virtual real estate in metaverses. However, challenges like high gas fees and environmental concerns from energy-intensive blockchains must be addressed to ensure sustainability. Platforms like Algorand, using energy-efficient consensus,