Starting small is ideal, staying in the same pond when you grow into a big fish is not ideal. You don’t want to become a deformed fish who has taken the shape of the pond. Now that you can feel that what you are doing is no longer enough, it may just be time to build capacity by taking on additional responsibility.
Step out of your small pond, yes, the new territory will be discomfiting for a while, but that is the point of life isn't it? Life in a thing is represented by continuous growth.
So, your time as a big fish in a small pond is up, step out, spread your wings and fly...