Dreaming of crossbows can symbolize a variety of themes, often related to protection, aggression, or a need for defense. Since you mentioned keeping many crossbows in a box, this might suggest that you have feelings of being prepared for challenges or conflicts in your waking life. The box could represent a sense of containment or control over these aggressive impulses or protective measures.

Alternatively, the dream could indicate that you have untapped potential or skills that you are keeping hidden or not utilizing to their fullest extent. It might be worth reflecting on what situations in your life currently require you to be on guard or where you feel the need to assert yourself.

Consider how you can channel this energy positively in your life. Are there areas where you can express your strengths more openly?