Can you sell crypto assets?

Excuse me, I'm curious about something related to cryptocurrency. Can you please explain if it's possible to sell crypto assets? I've heard that they can be quite volatile, so I'm wondering if there's a way to liquidate them when the time is right. Is there a specific process or platform that one should use for selling crypto assets? Additionally, are there any potential risks or considerations one should be aware of before making such a decision? I'd appreciate your insights on this matter.