Anyone can make up coins but why is anyone even buying any of these? If dogecoin has no real use... then none of those other coins have any use. So why do these new coins keep showing up?
Its because they are trying to gain profits. Yes plenty of tokens and coins without use case but has value and yes this is due to market buy and sell. Some hyped the ptoject and when the coin price increase they will exited it. Thats really the reality of crypto trading. More people often trade tokens just to gain not to stay there and be a fan of certain coins.