3 main markets that will always exist ?

1. Health
2. Wealth
3. Relationships

The reason is that there is always tremendous pain when you have lack in this area. There is always demand for solutions to these core human pains. ?

If you can find a smaller subgroup within one of those larger markets that is growing, has buying power, and is easy to target then present your service or product as a solution to one of these problems, you will be in a great position to scale!