When someone tells me that he’s going to start up the business, I ask him how the main idea attracts the market, and one more, about sustainability.
Sometimes go-getters miss that they should pertain their business. Without considering the point, the business comes to be easily in panic. People will surge in at a time (at first) and out soon after.
Then how could we take it into account?
Simulate it. Prototyping might help. Or offering to normal people would give you some responses about the business. There is bunch of ways to figure that out.
Usually good idea makes “ta-da” moment. But without sustainability, it could not aggregate the fortune. That is, it is not profitable at all.