I haven't seen any CD rates over 5.5% or 6% so I bet this 6% interest rate is a teaser and will go lower almost instantly upon investment if the instrument is like a savings account which you can draw from. How much money are you talking about? This makes a difference. What are the restrictions on the use of the money? This makes a difference. How long do you plan to invest it? Will you need the money for some necessity? This makes a difference.

Why not put $2500 or more into something like American Bond Fund=New Perspective? Or the family of funds currently in your 401 K invetsments? Or buy and hold a valuable fiddle. A garage sale could net you 500 dollars for a days work. Will you make that much in interest on your current potential investment? If you don't have a large sum it makes way more sense to use that money to buy and sell property such as real estate, antiques, rare books, or some gold.

To me, it makes very little sense to tie up less than a thousand dollars in an insufficiently researched online investment when that money can work for you in so many other more interesting and fun ways, Alice. Even CD's roll over automatically at the end of your investment period at a lower rate which you will then pay a penalty on if you have to retrieve it if you didn't take it out and get your interest at the end of the official period.   

If you have some extra and you feel bad for not getting some kind of return on it, use it for fun or a funner investment. YOu can't take it with you.... JMHO