Unused Steam account

Delete.

Just use it to activate any freebies you already own on the main account and maybe one day you'll gift it to someone dear to you. That's what I use mine for, only been using it for about 3 years and I already have about 100+ games on it from different Fanatcial/Humble/Steam giveaways.

Keep it, activate good but cheap leftover games you have no better thing to do; in the future you can use it (as far we know) for family sharing if needed.

Or you can just delete it, it's hassle-free and as others said, it has so little on it that it's not even a real loss, nor a good foundament to begin with.

Keep getting Free Games n keys on that account and pass it to your children.

Thank you all very much 💛 you helped me with my decision. I decided to delete it, since: I don't know anyone that wants it, I already have a third account where I also bought some multiplayer games to play with my son, this account is not worth that much.

If it's a really really old account (15+ years) it could be worth a lot - I remember people that played CS used to pay a lot depending on how low the steamid was.