Even if you assumed it was tightly correlated, then the second prices dropped you'd expect more people to buy. I'm also not sure what gas prices would be if suddenly everyone had an EV. Seems like they might be forced to charge more since the gas stations themselves would be making less on it?
In ten years I imagine a large majority of vehicles will still use gas. Last year EV sales were only about 7% of all cars. Cars have a relatively long shelf life and all projections I've seen (which admittedly are just speculations) have EV's passing ICE cars in about 15 years. But even then it's still half gas cars.
If I had to buy a new car today I'd still probably buy an ICE based on my needs/budget but I wouldn't do so because I think gas or car prices will crash or anything.
But with a recession on the way, and the fact that new deliveries can only go up, and gas prices can probably only come down...it may be that there's a big crash for car prices on the horizon, especially used cars. This is coming from someone who just bought a used car!
So I don't think it is a good time to buy a car.
If you drive a Tesla , but always wanted a SUV for camping, go for it.
Don't drive the Tesla to work