Domain sale after 24 years

Hello,

 

   I purchased a domain name in November 1999 as an investment.   I did not intend to set up the site, but I thought I might one day.   Turns out that never happened.   I sold the domain last year.   As the domain was never set up with a website or business, how do I declare that income?   Is it a long-term capital gain?  Is it normal income?   I've researched a LOT, and I see many responses on Google that say "long-term capital gain."   I'm just not sure if that's correct or not. Help!  🙂

 

Thanks.

 

Steven