Make field non-static.
Don't attempt to have GMCService set itself to null.
Make fields non-static.  Reduce scope of fields.
Avoid group declarations.
Inline method.
Remove unnecessary field.
Remove unnecessary overriding.
 Remove duplicate method call.  The title has already been enabled in MainScreen#onCreate(...)
Skip mutually exclusive branch when possible.
DRY.
DRY.
 Remove duplicate method call.  The title has already been enabled in MainScreen#onCreate(...)
 Centralize the setting of the title to [LTC | BTC | FTC] in the Activity.  Remove said behaviour from the Fragments.
 Introduce Currency enum.
DRY.
Ensure the ActionBar title is set upon app launch.
Change field type: int -> Currency.
DRY.
Move currently selected Currency into GiveMeCoinsDashboard.
Remove unused local variable.