It seems like this would be domain specific. You have a more than respectable library (although that presumably cost more in effort/taste than in money). I have a huge collection of digital media, firearms, specific types of tools, etc. If I had >$1b, I can't imagine ever getting excited about spending money on clothes, and I'd rather have invested early into TSLA than owning 10 Ferraris, but I'd also be buying Freedom Group from Cerberus right now.