While many individuals play the stock market to try and earn a bit of extra cash, some gearheads instead work the classic car market. Being able to find a car that stands out as a future classic long before it becomes one is a lucrative skill to possess, as when its value goes sky-high, massive profits can be made. There are many elements that go into making a classic car, though one of the key ones is that a given machine is groundbreaking for some reason.