I don't know much about steel coils, and I'm hoping that something that fits in your back seat isn't as dangerous as those featured in YouTube videos, but the idea that the primary concern is just strapping the thing down is kinda funny
https://www.youtube.com/watch?v=RC6pn8n7MeY
https://www.youtube.com/shorts/kDGfk-dOjq8
https://www.youtube.com/results?search_query=steel+coil+unwi...