What if someone claimed to have captured a tooth fairy in a bottle - wouldn't you want to know about that? It would be evidence of some previously unknown aspect of reality.
I'm more "agnostic" I would guess and would believe more of something out there, whether it gods/goddesses, if someone was able to show me proof of a fairy...maybe.
Seeing a Bigfoot would only lead me to believe "ok, there's another primate out there" though not of the "mystical" creatures.
Bigfoot doesn't grant wishes or give money unlike fairies that are well known for (as far as I've seen) (well, I should say from what I've seen in stories).
From what I've seen, Bigfoot is just a creature that no ones been able to really catch and prove but could be there and be another life form such as us. Am I right? Is there something to Bigfoot that I'm missing besides that people haven't proved or disproved one way or another?
Wasn't there a squid a while back discovered that was extremely large that had people in awe and many didn't know they existed because they lived way down deep...deeper than most people could go? From my understanding, this squid was only found because one died and floated to the top surface. I'll go and do a research on it but I think there was.