Agree. I'm not a CFA, but I do have a masters degree in finance and have studied it fairly closely the past few years. Investing should be thought of in terms of years, at a minimum. You're thinking about it in terms of decades, which I think is even better.

However, I offer up two counter thoughts to consider:

1) You say you don't need the money, but how do you know? There could be a better investment opportunity that comes up or we could go into a prolonged depression. Leaving some money not invested gives you more flexibility to allocate your capital down the road. You'll have lower highs but higher lows, which in the long run is good.

2) I actually do know a lot of people who are investing toady in hopes that there is a V-shaped recovery. This is particularly worrying to me and I can't tell you how many times I've overheard amateur investors at work say things like "the market is at a bottom so now is a good time to invest". These are people who have never invested before and only look at the stock price as the determining factor. Like Howard Marks says, market bottoms don't occur until all hope is lost. I'm not sure we've felt that yet.