Doing work with passion is the most amazing thing that happens to you. However, passion is not itself enough to keep you in the game. You need to see results. Pretty much seeing a light at the end of the tunnel.
Lots of external effects (raising capital or people think that you are doing amazing or working cool company etc ) might keep you push one more day. Still, it is not sustainable. Everything needs to come from YOU. (It doesn’t have to be YOU all do work. Your structure, your organization, your team, your models, etc) As long as you are onboarding new client, new transaction, new deal. You are good. Your passion is fueled by your efforts. It won’t disappear