Bitcoin is the greatest invention of humanity in nearly 500 years.

If you do not agree with this statement, it is not recommended to hold any cryptocurrencies.
There are two types of progress in human civilization:
One makes efficiency higher, and the other makes power structures more decentralized.
Simply put:
The internal combustion engine belongs to the first type, while the steam engine belongs to the second.
Computers belong to the first type, while the Internet belongs to the second.
The bourgeoisie replacing monarchy and taking the stage of history is not because kings are kind-hearted, but because the bourgeoisie mastered the steam engine, and wealth no longer depends on land; enough wealth can be accumulated through factories.
In the past hundred years, any invention you see or hear about is attributed to the first type, making society operate more efficiently, but not changing the social structure.
Why do almost all centralized countries resist Bitcoin?
This question seems very simple on the surface, but in fact, it is very simple. Because power is checked and balanced.
What is Bitcoin? In one sentence: it is the first truly personal money in human history.