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• 1.Transparent：All accounting information is transparent, anyone can check them.
• 2.Equality：All bookkeeping nodes are equal, there is no difference between them, and everyone has the same status.
• 3.Shared：All bookkeeping nodes share bookkeeping information, and all record all information in the ledger.
• 4.Immutable：When the ledger information is confirmed by consensus, unless a 51% attack occurs, all ledger information cannot be tampered with.
• 5.Holographic：Bitcoin ledger can not only record the transfer of funds, but also record the transfer of information, integrating funds and information transfer.
• 6.Decentralized：The Bitcoin ledger is a common accounting by multiple nodes and maintains a ledger together, so there is no center.

This is my opinion, what about you ?
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Interesting.
But number two not really necessary as long as all/most participants run full nodes and take part in full network consensus.
In a fair model that easily scale, certain participants can choose to control multiple full nodes of different sizes to guarantee continuous data availability and to enable any kind of participants (most/all participants) run customizable full nodes with that will hardly get to large or difficult to download/run. With this, anyone can still equally participate in consensus, whether you control multiple full nodes or just on mini full node. and Bitcoin ideals/principles are still preserved