OT:
The issue with cars is: NOW is the time to buy the last real cars that were produced. Prices will skyrocket for those as now we will see even more downsizing, turbocharging, battery-driven, etc.... Take the 911 for example, there wont be any natural-aspirated 911s anymore! You dont have to be a genius to understand that the 997 and 991 will skyrocket in price soon enough.
It will be hardly a business except for the specialised professionals. Take the Testarossa 80s models (1987 seems popular), they cost more now than they did new. But who made money by buying a Testarossa and maintaining it for nearly 30 years? it's a terrible investment as such. Maybe classic car brokers can make a lot of money in commissions. That's the epitome of niche, you don't base a prime time show on that.