actually if you think about old or new coins it should be more valuable old coins. because if seen from the development their platform should be running and used by many people. those who are a few old coins don't have a good price because the project updates they can't maintain their community, so some of the communities leave and switch to new coins. actually new coins are also like that, if there is no hard work from tea to keep the price good, they will also lose prices on the market.