For example: electricity.
If your community is struggling with municipal electricity, the obvious solution is solar.
So perhaps you should start a solar business, right?
Every Tom, Dick and Harry will be starting a solar business.
You’ll be competing with too many people, which equates to not making any profit.
Find a problem, then find a solution that only you offer.
If you can’t be unique in your solution, don’t do it.
It’s no good solving a problem that lots of other people are also solving.