Without a doubt, I believe that Bigfoot and the Yeti exist (Bhutanese stamp from 2014 featuring the Yeti, right). The evidence to prove it is quite good, despite all the idiots clouding the facts with their idiotic pranking and hoaxing.
I’m sharing a video of a program created by National Geographic documenting their expedition to Bhutan in search of the Yeti. Absolutely wonderful program! It’s about an hour long, and the best is saved for last, so do try to view it. Enjoy!