Aye. This is often critical when you simulate physics. Think about it:
If you apply an impulse, the box would fly away but it moved in the relative space of that actor. When you now ask the engine where that actor is - it’s still where the arrow is pointing. It did not move from where it was spawned.
But if you make the box the root - as you did - now the whole actor is tumbling away and its world location is the same as the location of the box. Technically, you could do this instead:
But if 1 coin = 1 actor, making the root the simulating element makes perfect sense.