I get why people want to speculate who will beat a champion but I think the replies to this thread reveal the reality.
Gaethje has a chance and can win this fight. Hell he may be the better fighter at this point, Gaethje has looked incredible.
But we would all be fools to forget what Khabib has done to every opponent and style he's faced. Gaethje is something different. Incredible wrestler, great striking (leg kicks in particular will be interesting to watch with Gaethje's combination of wrestling and other skills), and an unbelievable mental toughness. That said, we know his weakness too. He's been reckless in the past in order to force chaos. I don't know if that works against Khabib. I think that's a recipe to get caught or dragged to the ground and controlled.
But it probably wins 20-30% of the time if he can land that big shot.
So this thread sounds more like Gaethje "can" win than "will" win, which I think we all agree with--while our bet slips disagree.