Answer:
I am the yellow hem of the sea's blue skirt.
What gives life and love, and is there till they die? What can hide you and find you, heal you and feed you but should never give up on you?
I'm a long curved fruit that grows in clusters and has soft pulpy flesh and yellow skin when ripe.
What bank has no money?
What object has keys that open no locks, space but no room, and you can enter but not go in?
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.