You need 2 types of people to keep early-stage startups from stagnating:
- someone who’ll shamelessly sell the product before it’s fully ready to be sold
- someone who’s embarrassed by this and will push to improve the product faster
If you're the CEO of a fast-growing startup, the mistake you'll make in the next year that you'll regret most will probably be a hiring mistake. Possibly hiring someone established, which you'll feel you should do now you're getting big, and which VCs will strongly encourage.