Answer:
I am a good state, there can be no doubt of itΝΎ But those who are in, entirely are out of it.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.
A caribbean shape that makes ships disappear
When young, I am sweet in the sun. When middle-aged, I make you gay. When old, I am valued more than ever.
Iron roof, glass walls, burns and burns and never falls.
Often cooked as fillet, this meat comes from an animal that swims underwater.