In a large bowl, combine pineapple juice, coconut oil, eggs, and mashed sweet potatoes, stirring until mixed.
In another large bowl, whisk together sugar, flour, baking soda, baking powder, salt, and cinnamon.
Add the wet ingredients to the dry ingredients, and mix until just combined.
Fold in coconut and dried pineapple.
Pour batter into a greased or parchment paper-lined 9x5-inch loaf pan. I had some batter left, and made a few mini bundts. You could also convert this into two (2) 8x4-inch loaves - reduce baking time.
Bake at 350 degrees for 50-60 minutes, or until a toothpick inserted near the center comes out clean. For 8x4-inch loaves, reduce baking time to about 40 minutes.
Remove to wire racks to cool completely.