You won't necessarily have to, but yes, no risk no reward. Doing this is what people who have retired have to do whenever there is a market crash.

Really this shouldn't be that controversial. It's super simple: Which does better long-term? Stocks or cash? That's pretty much all I'm saying. There's a ton of data to back up what I'm saying.

https://earlyretirementnow.com/2016/05/05/emergency-fund/