I'm not talking about money laundering and financial crime, I'm talking about removing people's access to the banking and credit system due to their political beliefs.

It sounds like your solution to the problem is to take away the ability to remove people from the system altogether, no? If that’s the case, then you open up a whole new set of problems. There are far easier and cheaper ways to guarantee legitimate access to banking than rebuilding and migrating the entire system.

I don't think so. The nature of systems it that they tend to become corrupt if they can be corrupted.

Cryptocurrencies aren’t exempt from that, the 2018 Bitcoin boom and bust was likely caused by one whale account[0] manipulating Tether. By your argument, Bitcoin will become corrupted because we know it can be corrupted.

0: https://www.google.com/amp/s/www.technologyreview.com/2019/1...

The only way bitcoin can become corrupted is if someone gains control of >50% of the hashing power of the network.

I'm talking about the integrity of the system itself, not actors within it. George Soros famously did the same thing with the British Pound but the issue with the British Pound is that it is a fiat currency that can be devalued at the whim of a handful of people controlling the system itself regardless of market forces (aka the participants in the system). When Soros or that bitcoin whale "manipulate the market" they are still acting within the system.

Part of the digital currency deal is, that kind of privacy. Legislation may have to adapt? 'Money laundering' is avoiding taxes or hiding income. So change the rules about taxing money. Maybe a 'transfer tax' or some such, to take a (very small) cut on every transaction.

If cryptocurrencies are private enough to obfuscate transactions to the point that authorities can’t monitor illegal financial activity, how can the system also be transparent enough to effectively tax users? Isn’t taxation a centralized financial construct, in that a central authority (government) assesses taxes? If the coins built today become the mainstays of crypto transactions and don’t have a concept of a transfer tax, how will one ever be added to the system? The entire system seems to be built from the perspective that it’s “our playground, our rules”, but why governments ever allow that?