There's nothing wrong with making a big bet, in your case on cash, if you know why you're doing it and what needs to happen for you to change your position. Also, if you already have more or less what you need to live well without working for more money, preserving what you have is very sensible. Personally, I tend to be aggressive, having invested 90-100% in cash for decades. A couple of years ago I thought the market was too high, especially in tech stocks, so I moved to 30% cash and shifted from aggressive growth to balanced stocks and from mostly US to more global. If stocks continue to slide down, I'll start moving money gradually from cash to stocks, and benefit from the market's return due to the lower average entry point.