I myself am betting on 1970’s-caliber inflation and interest rates. I’d hang on to the CD for now and re-invest it in a couple of years at 10 or 12 percent, then when that matures reinvest it at 18 or 20 percent.
pay off the mortgage if you have the money, especially if you can no longer write off the interest. if you have a 5.375% mortgage, you would have to have investments that yield over 7% if it is not tax sheltered (ira, 401k). And given the volatility of the stock and bond market, the peace of mind is worth more than the 2.5% to 3% historical return above what you might save. i say “might” because there is no guarantee.