Trading domain names - business or investment?

I have a side gig speculating in domain names. This entails:

 

  • Looking for unregistered domains that I think have value
  • Valuing domains using various websites
  • Registering and renewing the domains, generally for multiple years
  • Listing the domains for sale on online brokerages
  • Negotiating with buyers
  • Transferring domains to the buyer

 

A couple of questions:

 

  1. Should I consider this a (Schedule C) business, in which the domain names are my inventory? Or are my domain names investments that would generate capital gains/losses rather than business gains/losses?
  2. At this point, I've retired from searching for new names for several years. Now I just maintain my existing inventory and very occasionally sell a domain (e.g., maybe one a year). Does this change the situation? (E.g., does this mean I'm no longer an "active" participant in the business?)