The Golden Apple from the Midas Tree seems useless and just takes up space

Tapping or farming the Midas Tree gives you Golden Apples. The level 3 apples, which are the highest level, take up 4 slots and don't seem to have any particular use. The apple's description makes it sound like it gives something good, and it's an Epic item... A level 1 apple sells for 8 coins. If you occasionally use it as a coin source, maybe, but it doesn't seem to have much use.