After mentioning Bitcoin in his Twitter bio, billionaire Elon Musk is back with several posts referring to Dogecoin (DOGE). It did not take more for the price of the cryptocurrency to soar, then fall just as quickly. Elon Musk blazes the Dogecoin (DOGE) After changing his Twitter bio to "#bitcoin" last week , billionaire Elon Musk is now praising Dogecoin (DOGE) in a series of tweets. Elon Musk...