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You don't know about Libra which is now Diem? The project was introduced by Facebook in 2019, supported by Coinbase, Mastercard, PayPal, crypto and blockchain firms Bison Trails, and venture capital firm Andreessen Horowitz, etc.
The reason why Ethereum and BNB are not shut down is because they are not seen as threats by the government.
Honestly, I don't have a single memory of the Libra you mentioned

. But if bitcoin becomes centralized, it will be like ETH and BNB, so it won't be as much of a threat to the government as it is now. That's why I believe the government won't shut down if bitcoin is centralized.
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You have a point but it's hard to tell what will happen in the future since tomorrow is not promised.
The future is unpredictable, but with something getting bigger and bigger and as it spirals out of control, it's clear that manipulation will become more difficult now.
I mean, in the future, when bitcoin matures and becomes bigger like gold or the stock market, nobody can manipulate it anymore. For what's going on, with a market cap of just $1 trillion, manipulation is inevitable and easily manipulated. I'm not denying what's going on.
Are you sure that bitcoin is manipulated? After people can hold and make profit. In long term bitcoin has been a store of value. No manipulation like you think. As of today, the marketcap for bitcoin is $572 billion.
The bitcoin network cannot be manipulated but when it comes to the movement and price of bitcoin, manipulation is pretty easy. With a market capitalization of just over 500 billion USD, which is only equal to the assets of the top 3, or 4 billionaires in the world combined, even smaller than the capitalization of a technology company. So how can it be called mature enough to not be manipulated?
The value of bitcoin depends on supply and demand just like other assets, but when it is too small, manipulation is inevitable. There will still be self-interest groups that seek to manipulate the market for their own profit.