Are you creating something today? Your competition is. If your not deeply aware of the fact that there is always someone working, often harder than you, to disrupt whatever your good at, then you have already lost.
It is healthy to have a keen sense of paranoia about the fact that there is always a younger, more attuned, version of you out there somewhere that will eat your lunch if you don’t stay on top of your expertise. And they aren’t going to take you out from head on. Rather, they are going to hit you from the angle you least expect.