@az I mean, that's kind of why I buy index funds and forget about it. Over a long enough period the stock market as a whole has always returned better than you'd get from an interest-bearing savings account, CD, or savings bond. So, indexes are, given a large enough window of time, always the smart and safe investment.
But, sometimes, the market goes fucking insane. It did it in 2008. And, I'm pretty confident it's doing it again now, and I think the end is nigh.