After completing the first six chapters, you should have sufficient knowledge to think about how to apply your newly acquired skills to resolving real-life problems.  As discussed earlier, blockchain is considered to be a game-changing technology, which can potentially disrupt existing business models by making intermediary services obsolete and inspire the creation of new and cost-effective business models.  However, this technology can not resolve all issues and its value can only be fully realized by combining it with other mature or emerging technologies, such as big data platforms, cloud computing, data science/AI, and IoT.

In this chapter, we first talk about popular blockchain use cases across industries, including financial, civil services, supply chain, IoT, and healthcare, at a high level. We will then proceed to a discussion of factors for consideration, before determining proper use cases and developing a successful DApp. Finally, we take the health data sharing use case and comment, at a high level, on building a DApp for it. Specifically, we cover the following topics:

• Examples of blockchain uses cases
• How to choose a proper use case
• In-depth discussion of the use case of healthcare data sharing