Its impossible to have one or two coins in crypto space because one or two coins can't solve all the problems we have in this world in every aspect of technology or others, if you want to keep a coin for a long time make sure the coin or token solves one or two problems in crypto space or the world, this type of coins don't die easily because they have real use cases, its simple as that
A coin that solves issues is what we want, although there are few of them we still want more as they are the type of coins which set this space on the Path of mass adoption. Most coins today are not worth it, nothing to show for, once the hype dies the real colour will be seen. Another issues is that team nowadays only cares for themselves am still trying to find those that will stick to bringing value which in turn will make their platform or project last long term. Coins like Eth, XLM are growing each day despite the nature of the crypto space because they are solving problems.