Altcoin won't survive more than 5 years if they don't have a strong cummunity to create an unlimited demand, because new projects are happening almost everyday and they're ready to replace a coin that don't have demand anymore. So, only the strong coins with high demand right now that will survive in the future
Why 5 years? If there is no demand for any coin, it can be considered dead already. It will stay at the corner of the any shit exchange with zero volume.
indeed coin depends on the developments that exist if you have a lot of development of the project created so that it can increase the use of which will make altcoin still have a future and can still produce price movements.