You should interview defensively at least a couple times a year IMO. It is good to know your market value. HR knows your market value. When your pay and your market value go wildly out of line, it's time to step up. This happens disturbingly often with long-term risk-averse employees.

That said, if you can't stomach risk, then don't do this. But try to understand that by not taking risks now, you're taking a huge long-term risk on your financial future.