I don't think you should ever ...

I don't think you should ever start a business and move in a direction where you can't see it becoming a business.
 Kevin Systrom

Quotes from the same author

Focusing on one thing and doing it really, really well can get you very far.
 Kevin Systrom
I actually think some of my best moments in life have been while I was with people from Instagram - whether it's super late nights getting a release out or being able to travel to places I'd never visited and meeting some of the most interesting people I've ever met.
 Kevin Systrom
Obviously, being the CEO, there are a lot of eyes on what you do and what you post and how you post, and I think one of the challenges of Instagram in general is that, as we get bigger, there are just more voices in the room, more eyes on everyone's accounts.
 Kevin Systrom
If you've got an idea, start today. There's no better time than now to get going. That doesn't mean quit your job and jump into your idea 100 percent from day one, but there's always small progress that can be made to start the movement.
 Kevin Systrom
I think not focusing on money makes you sane, because in the long run it can probably drive you crazy.
 Kevin Systrom