Answer:
The Black Pearl was this type of criminal seafaring vessel
One strand dangles. Two strands twist. Three or more can fashion this.
What loses its head every morning only to get it back every night?
I'm a green veggie that looks like a tiny tree.
Can be achieved in a car or as a position during conflict
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.