Well, if it's anything like exotic cars, then I guess it works like this: if you walk into a Lamborghini dealership right now and buy an Aventador off their stock, then yes, that car will lose 20-30% of its value the second you put the keys in the ignition. That's just how it is.
But....if you keep buying loads of cars from Lamborghini, eventually you will end up on a list of people who get to put a deposit for brand new cars that haven't even been announced yet. And if you get an opportunity to do that, then you do that. Because then you get to buy cars like the Centenario, like the Reventon, like the Veneno - and you can be 100% certain that those will go only up in price regardless of what their sticker price is.