Bitcoin only note:

Bitcoin is incredible simply from how so many people have exact/immutable copies of the Base Chain/Base Layer whatever you want to call it. It really is a simple database, dare say Excel/Google Spreadsheet. Try to keep two copies of one spreadsheet with read/write privileges in a family, let alone a company, let alone all over the world.

Do people realize how hard it is to keep EVERY copy of anything holding dynamic data in synch? Every company today fails at this.

Every company. 334,000,000 companies worldwide, proprietary data, and then comes Bitcoin?

Look at this from "Bitcoin Amsterdam" AntPool/Foundry can't even keep things in synch on two monitors.

It is hard, especially when timestamps are involved.

https://bitcoinapolis.blogspot.com/2023/09/bitcoin-bitcoin-is-database.html

My opinion on this further explained:

Bitcoin: "Bitcoin is a Database"