in my opinion, what makes a valuable altcoin is how the project is defended if their project grows, of course, traders and investors will glance at the coin so that with the increasing number of people hunting for the coin, making the altcoin more valuable.
I can see a lot of people are trying to factor out their own reasons, but the major reason when it comes to any coin at all is the product and when you are talking about this project, you want to be considering the solution this project brings into the real world, how people will end up perceiving it and using it in the long run as this is the only thing that would bring in huge demand for it, and of course, cause an increase in its value over time which will end up sustainable and not just end up as one other pump and dump material. Value is just what people can make use of and what really helps them in their daily lives.