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Nope, coffee won't give you extra energy. It'll just borrow a bit that you'll pay for later
(theconversation.com)
The Oromo people would customarily plant a coffee tree on the graves of powerful sorcerers. They believed that the first coffee bush sprang up from the tears that the god of heaven shed over the corpse of a dead sorcerer.
I don't think I've ever had a coffee crash but I definitely tend to be a mid to late morning coffee drinker. It's never really been intentional. I just enjoy the ritual of drinking coffee so I leave it until after my morning obligations.