At the risk of being pedantic, some used cars have appreciated (mildly) over the past year due to shortages of new cars. Also, some older enthusiast cars can appreciate if you know what to look for, have a place to store them, and know enough about them to either work on them yourself or not get ripped off.
This even works for some non-antique cars. Jeep Wranglers (TJ generation) and Mazda Miatas (NA generation) have both appreciated somewhat in recent years.
Of course, no one's getting rich when a car appreciates from $5000 to $6000 or $3000 to $3500 over a few years. Net of repairs it's probably break-even. But it's nicer than losing value :)
