Why do you want to build a blockchain on Polkadot?

If you search on Google: "Is building a blockchain hard?"

Building a blockchain is not an easy process. You can take a 4 months bootcamp to learn how to build a fullstack web application. However, with blockchain engineering, it requires strong foundational knowledge in computer science, networking and cryptography to build something that is usable by the industry.

There are a lot of domain specific knowledge to build a blockchain that is beneficial to the industry

Polkadot SDK provides a framework for you to use to build a blockchain easily without caring much about other primitvie knowledge and low-level engineering like cryptography, virtual machine, database...and only need to focus on building what matters to the logic of the blockchain. This is so-called application specific blockchain.

Substrate Client is a game console while the logic built on top of it is a game catridge that only need to plug and play

And there is another anology I really like is the LEGO bridge analogy:

Building a blockchain with Substrate is like playing LEGO What you want to build is a complete LEGO house aka a blockchain And what you have is single solid LEGO bridge aka a Substrate framework
You just simply add these small blue LEGO bridge on top of your Substrate LEGO bridge. And BAMP! You have a complete blockchain

Benefits of building a blockchain on Polkadot

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