People who are 30+, what career moves do you regret in your 20s and/or what choices are you happy you made?

Being loyal to a start up. As soon as I got those shares , should have cashed out and moved on asap.

Change jobs as soon as you can, easily blame it on being young and they never held it against me when I finally did learn that. And since you’re in your 20s, they will never let you retire there anyway. So why stay?