I'm not sure that's an easy question to answer. You can buy a well built car that will do most of what a Ferrari will do for well under £100k, so if you're looking at spending £100k on a car you've decided that you want more from your car than just basic utility. At that price point you're choosing the car you like best from a prestige manufacturer, so it all comes down to preference - you've already decided it's worth it. Ferraris don't have a particular premium over, say, Lamborghini. But to answer.. if I had £100k to have spend on a car and a Ferrari was my favourite of what's available, sure I'd buy one!