The idea of an entrepreneur is to ideally build a company that is bigger than the founder. In the early days you are critical, but over time your job is to build systems and hire people (or teams of people) to fill in these critical roles. In many ways the true measure of success is when you’ve managed to make yourself no longer a necessary piece.
I often said that my job at Crowd Favorite was to make myself redundant. And then to build redundancy into the team, processes, etc.