It's a really interesting time in the car sector.
Dieselgate. Brexit. Moving away from ice. Greater awareness of climate impact. Less reliance on cars in the cities. More reliance on finance. Cheaper credit. Now the wider awaking of all the above coming together. What this will all mean for taxes, fuel and city tolls.
The way I see it, ev cars are like white goods and wont appreciate. Modern super/hypecars are mostly too compent and too expensive so will drop a lot apart from limited editions. Older, more evocative cars will hold to certain price points as real drivers want their last hurrah and splash out. As 'cheaper' cars have had higher list prices the once 40k 360, has now gone up in value so it's not in the same bracket as a golf.
When things change, credit crunch (if we have one), a bubble bursts etc, I'd expect to see even bigger falls but also brining the more classic cars down too as running and fixing them gets more expensive.
Then again I got into investing just before the financial crash, bought bitcoin at its highest and house at the peak, so take my analysis at your own risk.