I don’t really understand cryptocurrency, but I believe that one of the defining characteristics is that the supply is artificially finite, at least for BitCoin.
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Crypto is the move to a cashless society. The US crypto ( Fedcoin) is in the Senate Comittee now, with a planned roll out soon? It is/ will not be finite. It will be created as needed, ( much like the USD) which is why a dozen countries are now developing it. Our Treasury briefs have stated they are watching closely China, as they have it in place, it will be instated country wide ( cashless) and backed by gold in less than two years.
DO recall Biblical prophecy.....
To answer your question, Bitcoin is NOT money. “ Money” must be stable in value...and....keep in mind a recent high profile criminal trial ( no link) resulted in .gov being able to recoup the Bitcoin ( Treasury was able to hack into it to recover the “ illegal money”.
Any new technology can be used for good and for evil.
Here is the good part. I think all the doom and gloom scenarios you are talking about will not happen under human control.
Possibly under a Super A.I. that turns on the people. The good news is that people are making failsafes for that. It’s not as far off as you think, but I would say less than 50 years.
Government 1984 fantasies just will not happen. This is because 99% of people can barely understand it.