The durability of NFTs (Non-Fungible Tokens) is guaranteed through the blockchain technology they are built on. Blockchain is a decentralized digital ledger that cannot be manipulated or deleted, making it a secure and permanent way of storing data. When an NFT is created, it is recorded on the blockchain, ensuring that its ownership and authenticity are permanently stored. Moreover, NFTs are usually ERC-721 smart contracts, which contain all the necessary information about the asset, including its digital signature, metadata, and ownership records. This ensures that the NFT can be verified and remains unique. The durability of NFTs is also supported by the fact that they are transferable between different Ethereum wallets, which means that they can be bought, sold, and traded just like traditional assets. Therefore, the durability of NFTs is guaranteed by the secure and immutable nature of blockchain technology, making them a popular and trusted way to represent digital assets.