If Bigfoot exists it would have been found and proven long long ago.
No DNA Evidence has been found—mistaken bears is my guess and a lot of pranksters with big footprint makers. Sill, lots of folks make a great deal of money on this scam. Now, the Yeti, It exists—they found DNA of an extinct Polar Bear—not around for 30 million years—Maybe its a bear rather than an ape?