Do you have a mortgage, credit cards, car payment, wife, kids? If you answer yes to any of these, you will be and probably should be a bit scared. That doesn’t mean you shouldn’t take risks. It just means you will have to make sure that if you do, you have a contingency plan.
I recommend a complete shake up up at least every ten years. Mind you, at 53 and not much materialistically to show for it, some might question my logic.
But, **** me, I’ve seen and done some great things. Personally, I’ve got no regrets for being a bit of a nomad and changing jobs as often as I feel I needed to has given me a broad perspective. Now self employed I feel I’m most comfortable with where I’m at.
In short. If you aren’t happy. Do something new. Challenge yourself.