More than a business model, Blockchain is just a process of collecting and storing data that satisfies some limited use cases. Blockchain startups can either refer to an existing business adopting blockchain technology or a new company developing its blockchain system. Creating a digital currency is no doubt, a blockchain venture.
Blockchain startups guide
A blockchain startup must ensure that they develop or use the technology for an already existing problem to make the business worth. Secondly, the scope of the problem must be narrow to keep you focused. Finally, ensure that Blockchain is a reliable solution.