SFI does have many earning opportunities so the answer is simply what you want to do.
All can be done or just 1 or more than 1 stream of income.
Look at how each stream of income can be used by you and how you can own it so that you believe on the opportunities and may share with confidence with others.
The answer is yours to play with - SFI is not a prescribed way of earning an income but is a means to increase your opportunities.