Though they are both metals, gold and uranium have little in common.
Gold is permanent. It is made into jewelry. For many centuries, it was used as currency. Uranium, on the other hand, is not permanent. It is radioactive, and it decays (albeit very, very slowly) into lead. If you owned an ounce of gold and an ounce of uranium, after about 32 billion years1, you would still have an ounce of gold but the uranium would turn into an ounce of lead.
Let's pretend that you no longer want your ounce of gold. You sell it and put $1,000 into the bank at 5% interest. If your bank only compounds the interest once per year, then after one year, you would have $1,000 + $50 = $1,050. But, banks are typically a little more generous...