Hunts yes.

Can you do nightmare hunts solo?

You can do strikes solo allready. But ok: then you have to play very early in the morning, e.g. half past 5 or something. If you do non- playlist strikes at that time, it will spawn you in there solo most of the time.

What is the point of nightmare hunts?

Nightmare Hunts are activities accessible on the Moon, introduced in the Shadowkeep expansion. Hunts are instructed by Eris Morn to Guardians to defeat the Nightmares of the Guardians' most formidable foes to weaken the Pyramid as much as possible.