A man went to a bank and gave them 60 000$ worth of bonds to hold for him and he asked to take out a loan of 1$.
The next year he came back to the bank to get his bonds and the accountant asked him "If you have all that money in bonds, why did you need to borrow 1$."
The man replied, “Do you know any other way I can use a safety deposit box for only 7 cents a year?"