As an example, if you had invested £100,000 at the peak exchange rate last year of 2.9 to the £1 you could have enjoyed and spend the nice monthly income on the interest that 290,000 lira would bring. If the rate drops to 2.2 to the £1 then you could change the lira back to GBP and the bank will give you £131,818. Of course, you won't get anything like the monthly interest on the capital amount but a profit of nearly £32,000 would be very nice.