Blockchain is a disruptive technology and is the future. However, due to technical complexities, lack of expertise and skills, and operational overhead, the adoption of blockchain is slow. These challenges were gradually addressed by cloud service providers who entered into blockchain solutions with the BaaS offering, which offered clarity on where we should host the solution.

So far, we've discussed DLT, blockchain, centralized and decentralized systems, and ledgers. We also looked at the blockchain structure, blocks, and so on. Now, I want to conclude this chapter by laying the foundation for what's next in the subsequent chapters. This section talks about the center of gravity (CG) of this book. Subsequent chapters will revolve around use cases and the implementation of a use case using Oracle's Blockchain Cloud Platform (BaaS). At this stage, you might be curious about how we will implement this. Consider this section as a glimpse into a blockchain solution provider and where it should reside. There are various steps before implementing blockchain. They start with identifying the use case and choosing the solution providers. Some of the questions you will need to answer are as follows:

• Why do you need blockchain and what's the rationale behind it?
• Is there a strategic choice or a tactical push?
• What are you building and how are you building it?
• Who is involved, how are they involved, who will decide, and so on?
• Where will the solution reside-on-premises or on the cloud?
• Who will be managing it?
• Who will take care of resilience? 

Many of the answers lie with BaaS.