I saw it more as, the Ferrari represented Cameron and his father's damage relationship. Cameron was the way he was, because his father was the way he was, and Cameron knew the Ferrari meant a lot to his dad. Him smashing it was basically a self-destructive cry for help (in my eyes). I felt like the viewer is left knowing Cameron and his dad will "work through something big/transformative" given the colossal impact the son (who the dad probably doesn't really care for) smashing his prized possession (that he really cars for) would have.
Ferris Bueller's Day Off - 1986
Fight Club - 1999
Doesn't Fight Club have the same kind of "life isn't about possessions, step out of your comfort zone while you are still alive otherwise you're wasting your life chasing Ikea furniture" message?