Scotland's institutions rely on the pound and, therefore, will need to retain it as the national currency. Luckily, the rest of the UK is also reliant on Scotland's participation and will be hard-pressed to maintain a financial relationship with the nation in the case of independence. Such a union would allow Scotland to create its unique fiscal policies while also keeping the pound as its form of money. Not only is this necessary for the success of an independent Scotland, but also to maintain essential relationships with their British neighbors.
First Minister Nicola Sturgeon has also indicated that she would not drop the pound for the euro in the case of Scottish ascension into the European Union.
And the UK would be smart to keep this relationship going, as creating any additional financial hurdles with an independent Scotland would risk the stability of both economies.