Yes you can deposit the money for extra income. My collegue is a overnight depositor for Xerox. Look the world over for high interest deposit account and stick it here. For an easier solution, swap your currency USD - GBP (Today 23rd Sept is pretty good) and hold your GBP in a suitable interest account or in bonds. Then when the USD strenghthens agains the GBP swap back to USD. There are many ways to swap the currency at a decent rate but with a few thousand 'negotiate' with your local bank. You can break 10% with ease in bonds per annum.