As the British pound rapidly weakens against the U.S. dollar, trading volume for the BTC/GBP pair has been skyrocketing. According to Bitfinex and Bitstamp data, the trading volume was more than 1,100% above its average. BTC/GBP volume on September 26th soared to over $881 million. By contrast, the average daily volume is only about $70 million over roughly two years.