If these altcoins are becoming worthless after just a little time, this only means they were worthless right from the beginning. That is the reality. There are so many altcoins which were marketed as if they are so innovative and promising and yet they are nothing but sugar-coated shit. They are only good as per their marketing and promotion. The developers only exert effort in that particular phase because they want money. After they got the money, they will leave the project stagnant to die.