Thanks for the stream links guys!
Looks like they haven't implemented auto-pickup like in some other games
My poor mouse.
Edit: I take that back, I saw in the Witchdoctor stream he just ran through the gold. I'm sure I saw the guy clicking it in the Wizard stream.
You'd be amazed what some people are like in games.
Like the guy individually selling items by clicking the cauldron then the item instead of using shift left-click, then doing the same for breakdown. I mean it even SAYS SO WHEN YOU HOVER OVER!

If there isn't autopick up, I'm sure it's because it's the amount of drops would fill up your inv all the the time, if there is then they probably aren't using it, or it could be on a on-use button.
Not to mention health/mana globes and cash is already radius pickup with items that increase the range
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