Anyone believe in Ghosts ?

No, don't believe in them at all. And as for big foot, that was a hoax done by a farmer Down in Humboldt County. He made some feet out of plywood and then went walking around the woods dress up like some monster, The reason for it was to scare the coyotes away from his stock. He was on one of the talk shows a few years back telling the story of how and why he did it.
There have been several people claiming to be behind the bigfoot thing. Almost all of them were proven to be outright liars and a few did actually perpetrate some hoaxes. Their stories do not in any way invalidate the actual scientific research (including DNA test results) that makes it pretty certain that there is an unknown speices of primate out there.