If your seeing this purchase as an investment you need to rethink what you want for your money. ANY car is going to lose cash. CASH. Hard earned CASH that you takes hundreds of hours to earn! This car will drink CASH at an alarming rate if your young (insurance) and counting your pennies (petrol).
If the amount of money your going to spend/lose outweighs the positives of owning one, don't do it. To fully enjoy this and any other car, you need to remove the term 'investment' when you think about your purchase. You'll spend your time worrying about depreciation and not enjoying the car. If you can't afford to lose half your cash in 3 years don't do it, if you can, go for it