Go to a blank sheet, ie. Sheet2. On the ribbon go to Data > From Web
A small browser window will pop up. In the address bar input a site that displays the price. Here's one that seems to work pretty well --
http://bitcoinprices.com/Click the little yellow arrow in the top left corner, click the Import button, then when it asks for the cell just use the default (A1).
You should see the USD bid price somewhere around row 15.