Hi Laika,
Actually Scandinavia demonstrates that all sorts of currency options are viable.
Denmark - uses its own currency pegged to the Euro
Sweden - uses its own currency with a floating exchange rate as an EU member
Finland - uses the Euro
Norway - uses its own currency with a floating exchange rate as a non-EU member
Scotland as an indepdent country could peg its own currency to the pound, or peg to the Euro, or have its own floating exchange rate, or use the pound or join the Euro. All of these are viable options that are directly comparable to what many other countries do around the world. Scotland as an independent country would choose the best option at the time, and as an independent country it would have the ability to change, as other countries do all the time. There's nothing particuarly remarkable about it, unless you buy into the notion that Scots would be singularly inept at managing and choosing between the many currency options available in the modern world.