Focusing on your current user base gives you incremental growth. Focusing on unengaged users can give you exponential growth.
Thoughts on the PTOTD
There is only so much you can do for the existing users after which the effort to impact ratio gives diminishing returns. Keep your eye on both the engaged and unengaged users and see how you can balance acquisition and retention.
Join 100s of other Product Managers in reading & discussing this PTOTD: