It fetches currency data (in USD) from two different APIs, upon successfully retrieval, the promise is resolved, and some calculations work out the GBP/Bitcoin exchange rate. I'm trying to find a clean way to then flip to the exchange rate ie. Default: Show GBP/Bitcoin Toggle button: Show Bitcoin/GBP.
“Bitcoin Foundation to Standardise Bitcoin Symbol and Code Next Year”. CoinDesk. Retrieved 28 January 2015. As of 2014, XBT is used by Bloomberg L.P.,* CNNMoney,* and *         Bitcoin Foundation will attempt to establish a Unicode symbol for bitcoin. The leading candidates are B