The question here is how many of the potential customers you've already reached? How do you define the target group? How do you limit it, especially in very early stages?
At first, startup has 0 customers. Apple has a bit more. Both define customers differently.
For new products, we try to validate the idea with at least 10 people that are wiling to pay. We start with a narrow niche (as narrow as we can make it).
At first, startup has 0 customers. Apple has a bit more. Both define customers differently.