My significant other is equally interested in the subject and believes that there is something out there.
Other people are a mixed bag. Several of my friends in New Orleans were very interested in these sort of things, but I haven't found very many in South Carolina.
Many of my girlfriend's family believe in it and have even had encounters. Others laugh at it.
At the end of the day, who cares? As long as they are not constantly belittling you or attacking you for your interest, who cares? Several people who I know think that it is silly. And why wouldn't they? An 8 foot tall ape man living undiscovered in the 21st century? No body. Just ambiguous audio clips, blurry video, and easily hoaxed footprints. The topic is represented by the most cringe inducing people imaginable in media. Why wouldn't the average person think that it is kind of silly unless they had an experience themselves? When people look at me genuinely baffled about the subject I can only agree. I don't blame them. A lot of it doesn't make sense.
Imagine that you are someone who is slightly interested in the subject. You go onto YouTube to check out some videos... and the very first thing that you come across is Matthew Johnson giving one of his unblinking and unhinged monologues about Zorth. You would walk away thinyk that the subject is crazy too.
A friend of mine is considered the world's top breeder and trainer of coon hounds. He has probably spent more nights in the woods than in a bed. He constantly gives me grief about Bigfoot. He's never seen one and believes that it is impossible. But, it's in a joking and loving manner. I also bust his chops about how his wife wears the pants in the family. It's just two guys busting on each other.
If you are running into people who want to belittle you in order to feel better about themselves, then you can either ignore it or punch back. "Yeah, Greg. I look for Bigfoot in my spare time. What about you? What sort of #$#@# stuff do you do in your spare time? Golf? Golf??? Golf is for $##@##. Here, let me tell you why".
Finally, a lot of people who instantly start disparaging the subject do it because they know that people in general think that it is crazy. They don't want to be thought of as crazy themselves. Get a couple of beers into that same person and just wait for that "Well, there was this one weird thing that happened..." story to come out. A lot of them have had experiences with something ...they just don't want to be called crazy themselves so they don't openly talk about it.