P: The product market fit: the product market fit is just one of the qualities of an successful solution
P: The product market fit: products that succeed solve real customer problems.
One way to achieve that is by creating something unique, something that cannot be replaced, that gives value to people. Usually, it requires a combination of specific knowledge and [authenticity](TK PN: The best way to succeed in business is through authenticity) which result in a creation of a personal brand that solves specific problems of a group of people. Examples of such brands are Tim Ferriss, Joe Rogan, Tony Robbins. These are just the biggest, but you don't need to be that massive to make a good living, satisfying 1,000 people might be sufficient for a decent living. Start small but be consistent. Eventually, you'll succeed.