This is a continuation of a debate found here.
Yes, the KRAKEN!
"Do cryptids exist" is not a very good question (no offense). There are literally thousands of cryptids. Some may exist, some may not.
Maybe, as a guy who watches Lost Tapes, we may never know, and if there's one thing we must ask:
"Do they live among us?"
I'm pretty sure Rock Apes are possible, although I wouldn't go so far as to say I believe they exist. Mark Felton made a great video about them. On the other end of the spectrum, the Plesiosaur Nessie is completely absurd and impossible. No air breather could hide from people in a highly scrutinized lake like that, not to mention one that somehow waited out an Ice sheet covering the Loch.