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
it is very true what you posted and i see a lot of sense in it. but have you thought about the fact that we have 2 - 3 different coins trying to solve same challenges? there are infarct so many duplicated functions currently and that alone can be the very reason why they don't get to see the light of day after listing in an exchange. its a good thing we have the first 50 coins on coinmarketcap, they are solving a lot of challenges already.