Any Entrepreneur or Investor will tell you you don't have much of a business until you find Product Market Fit -- meaning, your product solves a pain point so well that there's real demand and people need it.
Jack Altman, the unicorn founder of Lattice and now AltCapital says the best way to do that may be unconventional -- SELL the product before you've fully designed and built it to validate your demand and get on the the road to PMF faster.
More advice from top investors and entrepreneurs on the IO Podcast:
https://www.youtube.com/watch?v=DVZXnaH7Agg&t=3776s