“Is lack/ limited ambition a bad thing? I am happy with my job (pay, duties, etc), but there is expec asdfadsf ”

Is lack/ limited ambition a bad thing? I am happy with my job (pay, duties, etc), but there is expectation that I will move up. Moving up means more money, but more stress & responsibility.nI know I am capable of doing a lot more, but I prefer being comfortable. Am I being safe?