NFTs (Non-Fungible Tokens) cannot last forever in their current digital form. The main reasons for this are; 'i' Dependence on the blockchain 'ii' Storage and hosting 'iii' Technological advancements. It's important to note that efforts are being made to address these challenges and find solutions for long-term preservation of NFTs.
presently; NFTs don't have a guarantee of lasting forever in their current digital state.