Depends upon your concerns and what you're willing to accept. What would define success as? Do you need stable income? Are you wanting to bank on them being th

Depends upon your concerns and what you're willing to accept. What would define success as? Do you need stable income? Are you wanting to bank on them being the next unicorn (looking for equity)? There is so much required to understand your circumstances and goals that this question is too broad to be answered.