I retired at the end of December, 2007. You know what happened right after that, of course. Since you planned to wait for quite some time to withdraw anything, chances are good that things will recover along the way. It would be good if you could tell everyone what fund(s) you are invested in. The answers might be more specific if that information was known.
I'm not sure I know. I signed up for Vanguard and the strategy there that supposedly decreases risk the last few years until I am 67. I'll try to look it up.
I know I should know more, and it's rather embarrassing not to know when I'm posting here but the reality is I don't know much. I got onto the safest thing I could find all those years ago (Vanguard) and let it take care of itself all these years.