They are serious because it could be their very first project. But you decide whether it's going to be worth it investment. There were YFI forks that are existing too and I guess we will see more of them and jumping off with the same name as the YFI trend.

These Y series tokens can go up as long as there's a demand that's triggering them. But once many have stopped getting into Y series tokens and decided to go calm again investing, we'll see them investing back to the safest option, bitcoin.