Elon Musk's latest tweet lifted Dogecoin out of its slump, driving the crypto meme-coin back above 22 cents after a steady decline that had seen it slip below 20 cents on Thursday. While the notion that Musk can move the crypto markets with the push of a button is well established at this point, his thoughts on the wonkier aspects of digital currencies are particularly curious, especially for those not well-versed in their technical intricacies.