I'd buy a new car, probably a BMW or an Audi (I love German cars) but I would keep my Fiesta as a run around, only because I could. Actually, I'd probably buy lots of new cars
. I'd buy a nice house, something for half a million would do in the country somewhere, a few acres and a nice big garage to keep all my cars. I'd quit work and live off the interest, which even on 5 million would be crazy amounts.
I wouldn't be greedy, and wouldn't forget the important people in my life like family & friends, so I'd buy 'em all something nice for putting up with me all these years