I am very impressed.Actually I'm at that stage of life. Officially an "Old Fart". I retired early in 2000 with a buy and hold mentality and soon found that half my nest egg had disappeared. I didn't panic and sell at the bottom but I realized that I wasn't comfortable with a buy and hold strategy.
I came up with a market timing strategy that kept me out of the 2008 melt down and also had me mainly in cash in Feb/Mar of this year.
My portfolio is a poorly diversified equity portfolio. To me there is no such thing as a safe stock. There can be quite a difference between a good company and a good stock.
Do I get whipsawed form time to time? You bet! but I'm more comfortable in cash with the market going up than I am in stocks with the market going down. It's much easier to lose opportunities than cash.
You have to do what allows you to sleep at night. Do what's right for you!!
I don't have any special skills or methods to move in and out to avoid disaster. My portfolio performance is lumpy because it is based on leverage but I am used to it by now.
Take care sir.