What is your timeline? If you are thinking within the next 5 years, @Charles Carillo hit all of the main points. Like most posters here, I only offer opinion, not investing 'advice' - but I wouldn't invest in the stock market as you said you want to protect your principle. Unfortunately, there are few other tools out there that exceed inflationary erosion. E.g., Ally.com is a popular online bank with a nice HYSA rate that is in near-lockstep with the Fed rates (3.85% as of this writing, while the CPI is published at ~4.9%). CDs are nice tools as they don't float, but lock in predictable returns (a 60mo yields 4.1% presently). Normal CDs can also be redeemed early for a minor penalty (brokered CDs through decent outfits like Vanguard or Fidelity are different animals). i-bonds (a savings bond) get a lot of press when inflation is flying and are about the only tool that will approximate inflation (https://www.treasurydirect.gov...), but that's not guaranteed. I-bonds do have some tax-advantages these other tools do not. And finally you can look at the trifecta of T-bills, T-bonds, and T-notes with their own holding periods and interest rate scales.