Isn't #4 just moving money from one type of asset (equities) to another (real estate)? It's a bit of a gamble, but not crazy by any means.
The point that I was trying to get across is that across the people I personally know around my age, I can find examples that run the gamut of financial risk - everything from "leave it in a savings account" to "YOLO on options." Because of this, I don't think it's particularly useful to draw conclusions about what the general population is doing based on anecdata alone.