I want to explain something that People might not yet realize about what that Rope indicates.
Basic CoO is "Solid" Form of Haki --- Because Haki used for it has Fixed Volume & Fixed Shape
Basic CoA is "Liquid" Form of Haki --- Because Haki used for it has Fixed Volume but Non-Fixed Shape
Basic CoC is "Gas" Form of Haki --- Because Haki used for it has neither Fixed Volume nor Fixed Shape
So Basic CoC is just like any other Gas, it functions similarly.
Imagine if CoC Haki is Part of OPVerse's Air, it can be unleashed like a Wind Gust & also can be Stored in Wind Ropes
Why am i explaining this?
Cuz if you believe that Dragon is definitely a DF User, then you should think twice
And the Fact that He acts as if Wind has it's own Will, this means someone have a Global Haki that is part of OPVerse's Air.
Such Haki would be able to change the Weather & influence the World & it's People in many ways.
Roger, Shanks, Oden, Rayleigh, Gorosei, Yonko ... etc these have Top Haki, it's Overwhelming for sure
But there is a Reason Oda chose to show Haki Feats from all of them & even showed Joy Boy's Haki & revealed his Powers
Yet He refuses to show us Power Source or any Haki Feats or any Fighting-Style Reveal from Dragon & Mihawk
Simply because there is more than just Haki, if it's not associated with "Storms" then you haven't transcended Human Limits.
Mihawk's Introduction Chapter was Titled "Storm" & i already talked about Dragon
And it's not coincidence that MC's Most Powerful Finisher is Gomu Gomu No Storm
Only reason Weather in Grand Line is Unpredictable is cuz it's Man-Made.