Out of the ones you mentioned I find them highly unlikely to exist. However there have been animals that were once thought to be cryptids turn out to be real animals such as the giant squid.
Well, Nessie for example turned out to be tree logs rising from the sediments through gases accumulated in them by decomposition, floating until the gases are gone, and sinking again. People just made up the rest with their imagination, consciously or unconsciously. I don't think cryptids like those in stories and legends really exist as such, but I think there are lots of weird animals undiscovered by now, or phenomenons, who make our imagination go wild.
Out of the cryptids I know of the only I think exists is Bigfoot. Although the only reason is that video that was proven to not be a man in a monkey suit.
I don't particularly go and hunt for them, or really think they exist, but I try my best to believe there is an actual monster in Loch Ness and all these other things, cryptids are fun to believe in
You forgot the Kraken bro. Everybody knows the Kraken exists :l
Yes, there are krakens, but they aren't like humans depicted them before. Tales depict them as huge and able to bring down an entire ship, and not just a rowboat. This is the part that isn't true. Know what I mean? Cryptids like those in tales don't exist, but there are animals who exist who started all this.
Depends on what cryptids. Some may exist, and some can't exist by the laws of physic. Damn you Newton!
You forgot the Kraken bro. Everybody knows the Kraken exists :l
The Kraken does exist, and some of the Norse mythology tales about it taking down ships are true.
@HahiHa
Yes, there are giant squids that have attacked ships, and not rowboats. I don't think you go out to the sea with a rowboat, and especially not in Norway-Iceland seas, where it's very cold.