I think that it will not give anything, investment capital has already been spent for projects. Therefore, it is easier for them to close it and create a similar one, and if the coins were dead and did not have demand and development, then where would it come from with the bull.
bull will come, if some of your altcoin assets die, and don't have value, it becomes a very bad project, because they can't survive. Look at some assets that are able to survive and still have their community. like ethereum which is now able to rise even if only slightly.