Giraoilga asked: Do you think there are more Night Furies in the world?

Yes. Toothless needs to find his family. I mean, Toothless...... Toothless's only family is Hiccup, Stormfly, and Astrid. He doesn't have any dragons of his kin to hang around with. Imagine not knowing if you were the very last of your kind. In my mind, he can't possibly be the very last Night Fury. If he was, then, I wanna find out what happened to the others. BUT, Valka said that she's never seen a Night Fury up close before, which leads to two conclusions:

1) She's seen them from a distance before they disappeared

2) She's seen them from a distance, and quite recently too, thus implying that there are more

My hopes are up on the latter of the two, though the first is more likely.