The content originally appeared on: CNN Abu Dhabi (CNN Business)When the world's biggest cryptocurrency exchange decided in December to set up an advisory body in Dubai, local bitcoin enthusiasts celebrated. Binance's presence would be the jewel in the city's crypto crown as it tried to position itself as a hub for the digital asset. The crypto exchange's CEO Changpeng 'CZ' Zhao - recently ranked as one of the richest people on earth -even tweeted a photo of himself in a […]