> Giving criminals and scammers the ability to exchange goods and services anonymously.
Plenty of scams happen right there in the open. With all the traceability that fiat currencies provide, gift card, advance-fee and other scams are still plentiful and the victims are very unlikely to ever see their money back. In the UK, even when reported by the financial institution to the National Crime Agency, they often do nothing and the institution is forced to return the money even in cases where it's very obvious it is part of a scam. A lot of people I know are still getting constant scam calls trying to get them to send fiat money to them under various excuses so clearly these people are able to launder that money and evade the law just fine, and I doubt they're using crypto for that.
> criminals
The other problem with considering every "criminal" as bad is that the definition of "crime" depends on who's currently in power. Beyond the obvious violent crimes that the majority of people will agree are bad and should be prevented/punished, there's also a huge "grey area" - Russians who disagree with the war (or even call it a war instead of a "special military operation" as is the official party line) are now considered "criminals" by their government. Do you agree with their assessment that those people are bad and should be punished?
> Providing a source of funding North Korea's nuclear weapons program
The fact that there are people working (or rather, being exploited) on the ground in Poland and Russia: https://www.youtube.com/watch?v=SPjKs8NuY4s and https://www.youtube.com/watch?v=awQDLoOnkdI suggests that moving money is not the issue when they seem to be able to transport people just fine.
> Allowing nation states to engage in global commerce despite sanctions because they won't stop killing innocent people
I disagree with punishing average people and making their life hell because their government, over which they have no power over is doing something stupid. The vast majority of these people don't intend to hurt anyone and were just unlucky to be born at the wrong time and in the wrong place. If your solution to stupid governments is to make the life of their citizens impossible, may as well just nuke said country and be done with it?
I'm no crypto fanatic. I don't believe in Web3 and call BS on whatever new crypto project comes out (and so far I have been right the vast majority of the time - every time as far as I know, but leaving the benefit of the doubt). I don't want crypto to take over the world because it's inefficient compared to competing solutions. But cryptocurrencies are a useful tool in certain situations just like end-to-end-encrypted messaging or anonymity tools such as Tor, and their benefits outweigh the cons even if they can be used to facilitate "bad" things.