If you think that's a crime you are delusional about the uses of money.
Crypto allow me to create a structure where people can work in an animal health control for rural parts of the Patagonia (which is around 2000000 squared kilometers, five times the size of Germany and has 1/80 its population) and provide this kind of services for free in many cases.
I can now quit/leave/die and anyone can take my place to coordinate it in the same immutable structure.
And the best part? The state can track all the transactions if they really want it. But I'm sure no one is going to work to find out how six veterinarians got 125 USDC in their digital wallets in July 2023.
If it wasn't a crime, why do you have to use cryptocurrency for it?
Or is your definition of "crime" more abstract, not a literal interpretation of the law?
And if you want to know "why you don't simply transfer through a bank?" I encourage you to read the Corralito wiki.
Just before the Corralito ended, there was an asymmetric pesification of bank deposits. This meant that if you had 100k USD in your account on Monday, by Friday it would be converted to 100k ARS at a rate of 4 ARS = 1 USD, effectively leaving you with just 25k USD.
This event left a general feeling of discomfort regarding leaving real money (in terms of store of value) in the bank.
1. https://www.google.com/maps/dir/Viedma,+R%C3%ADo+Negro+Provi...
Tax evasion is against the law and therefore is objectively a crime. Whether or not the law is good is a different discussion entirely.
I don't condone tax evasion, but if I can't work because the State wants to go broke before I can even start running my business sorry but no one will do it.
I'm not commenting on whether this particular case of lawbreaking is morally supportable or not. Even if it's 100% morally justified, it's still lawbreaking.
Perhaps it's against the written law, but I think in most countries I am aware of, laws are subject to the judges' interpretation.