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"Now, the co-founder of the Quantum Fund and Soros Fund Management, Jim Rogers, has warned "what is happening with the U.S. dollar now is the end of the U.S. dollar"—but cautioning governments likely won't allow bitcoin to be used as an alternative."
First, one questions his judgment given Soros is involved. Something like bitcoin would undermine Soros' entire gameplay since it would allow individual people to protect themselves from what he and his ilk want: control over everyone and everything. Is he truly giving his opinion or giving their hope?
Second, he may be right about the damage to the US dollar between the stuff with SWIFT, petrodollars, China and Russia. The dollar has been in decline since the Fed came into existence and even more so since the 1930s when FDR (socialist democrat) confiscated gold and undermined the sanctity of the gold backed dollar. This has been a long term destruction of wealth and property that was supposedly inviolate in the US as founded.
Third, as far as bitcoin goes, government may not "allow it" but given that it is permissionless, that that may just encourage people to get into it while they can and remain in it.
For example: if the authoritarian players can cut Trump off from Twitter, FB and, most importantly, various payment systems, they can cut anyone off. When a billionaire, President isn't safe from the tech fascists, no one is. Just ask the people of Canada, Russia, China, etc.
People who are being cut off will just not cash out of bitcoin and trade within it. This is yet another reason privacy upgrades are critical. Anyone world wide should be paying attention: do you want thugs like Trudeau to shut down your bank account? Biden on Russians? Putin on Westerners? Chinese on Taiwan? Cuba, Venezuela, NK? You name it everyone worldwide is at risk and a safe way to protect yourself is via crypto.