You cannot create a market that doesn't want to exist.
One thing that often disrupts momentum and really shouldn't is competitors.
AirBnB happened because Brian Chesky couldn't pay his rent, but did have some space.
Momentum and growth are the lifeblood of startups. This is probably in the top three secrets of executing well.
Two other things that we hear again and again from our founders, they wish they had done earlier, and that is... simply writing down how you do things and why you do things.
Obsess about the quality of the product.