What is the essence of Bitcoin?

Here is my personal understanding

First layer: Speculation, scams, the underlying asset of a hundred times contracts, as long as there are ups and downs, this is the view of most people

Second layer: It is blockchain, a decentralized ledger, but very few people understand it

Third layer: It is a product of the 2008 subprime mortgage crisis, a digital code that hates the government's unlimited QE to create inflation, each inflation greatly widens the wealth gap, its core response to inflation is a constant total amount, halving mining every 4 years

Fourth layer: It is a product of trends, digital gold, people gradually start to have faith in it

Fifth layer: It is a true circulating currency, benchmarked against gold in global monetary value, Bitcoin's value exceeds 1.5 million dollars each

Sixth layer: A tool for the U.S. to manage its debt

Seventh layer: The most popular currency in the future AI world, humanity cannot live without mobile phones, and even less without the AI world