We do a CD ladder with a part of our retirement account. I feel, at the moment, that stocks are very iffy. We still have a sizeable amount invested in the market, but felt better with some of it "moved to the side" so to speak in CDs. I chose maturities of 3, 6, 9, 12, 15 and 18 months. When the 3 came due, it went into another 18 month. So, every three months one comes due. At some point, the money will go back into the market maybe. On "on the side" money is what DH and I could live off of IF we lost everything else in the market. Not planning on doing that, but better safe than sorry. Our financial advisor tells us to do what makes us comfortable. Who cares what others think?
We wanted something very safe. CDs are as safe as it gets honestly. Nothing else has that level of safety. As I say, we still play with a pretty large sum of money in the market. But, for some, we wanted safety.