My last question came in response to recent criticism of crypto currency here: https://twitter.com/Pinboard/status/1399058952336277505 and similar. As someone pointed out, ransomware payments in the millions can't happen without crypto. Banks would stop the electronic payments and cash would require suitcases.

Alright, but still. The ability for some party to block or stop a transfer would make cryptocurrencies not be cryptocurrencies anymore, the topmost reason cryptocurrencies exists in the first place and the reason they are built the way they are built is precisely to have the feature of "unstoppable transfers". Changing that and you might as well use banks as we already have "electronic cash". Using that as a argument against cryptocurrencies is a bit like using "but the water irrigation system is using water" as a argument against irrigation systems, it's the main point of using it in the first place.

We can't add selective control to allow just government agencies to stop cryptocurrency transfers, it'll eventually be used by others, one way or another. The only way of stopping anyone from being able to straight up manipulate the chain is to disallow anyone to manipulate the chain.

Wire fraud is pretty common - https://certifid.com/wire-fraud-cost-french-film-group-pathe...

That's really something totally different. That fraud is basically tricking people into sending money where it doesn't belong. Ransomware wouldn't be possible with wires.

Look up swift. Transfer of money is controlled. That is what is (ab)used to impose sanctions.