Silly for you. But for him it meant enough that he decided to spend his cold hard earned cash on it and that's good enough for most and probably should be good enough for you.
One mans expensive toy is anothers childhood dream or self promised reward for decades of hard work.
And who knows, it may turn out to be a good investment in the longer term, Porsches and Ferraris have a way of keeping their value (provided you don't drive them too much or wrap them around a tree).
No matter where you spend it, money goes somewhere. Why shouldn't people at Porsche be able to earn money from someone who wants and is able to afford one of their cars?
What is not silly? Someone invented a way of enjoying things after you die? Or is there a template for being happy that we all must adhere? Let me guess: "spend quality time with the people you love", "travel the world and experience more", "achieve something that will remembered" and other typical b..it.