The price of Dogecoin is soaring again after the cryptocurrency received another series of apparent endorsements by the world's richest man, Elon Musk. The future-moulding entrepreneur appears to have thrown his weight behind the coin – started as a joke born of the internet culture in which the infant crypto market has developed. Musk's seemingly light-hearted Twitter posts – one of which consists of a meme portraying him as Rafiki from the...