You have to go with the truth. You're an investor in domain names. Naming is the oldest profession. See Genesis 2:19. It's interesting. Don't worry that it won't be interesting to someone else. I once spent an entire dinner out explaining the Commerce Clause to my partner & how it made the 1960's civil rights laws possible & he still loves me. If someone is into you, they'll be interested in what you do. And truth be told, domaining is fun and interesting. At least I think so. But then I thought the Commerce Clause was fun and interesting too, so you might want to keep that in mind.