Not all crypto is decentralized and permissionless, you are talking about BTC when you name these features, there are a lot of centralized cryptocurrencies, ones that their issuers can even confiscate funds when it is held in your own wallet, like usdt.
Scammers use a lot of tools to scam people, not only crypto, i know a lot of people like to isolate statistics like this to talk bad about BTC and crypto, but they are simply anti-crypto. BTC isn't even a suitable tool to move stolen funds, because of its public ledger, but many people tend to forget that fact.
Yes I did forget about USDC and USDT confiscations. As two of the largest cryptocurrencies they show an example of how a centralised entity can acquire a lot of power in decentralised spaces and no other stablecoin is keeping up with their valuation.
Tether is still a tenth of the valuation of bitcoin though so the PoC still favours decentralised, immutable and permissionless. Since there's so much centralised power on usdt and usdc, it might be interesting to see what happens when something goes wrong and someone acts malicious (like what happened with Terra (USD) but only time will tell on that one).