What control do you have over people who wants to buy ANYTHING from you to commit a crime? So you sell your car and someone use that car to commit a crime, and you
get charged for selling the car? It's ridiculously stupid to charge someone for that. It's a whole other story, if they can prove that you knowingly sold that asset {digital or not}
to assist someone to do a crime. I still say, they wanted to make a statement with his arrest, and they succeeded in doing that.
Why are you conflating the two when they are clearly distinct? There is a world of difference between knowingly assisting someone to acquire stolen property and exchanging funds without knowing. The end results may be the same but you are not culpable for that crime.
Firstly , if you are selling BTC and the buyer unnecessarily gives up information that could make you liable for participating in a crime they are either undercover or an idiot(in which case they are sloppy and likely to implicate you by accident). Either way you shouldn't deal with these clients as they are extremely dangerous regardless of how you feel about the ethics in assisting people buy stolen credit cards.
Personally , I think its good advice to simply be more ethical and avoid people of questionable behavior altogether because:
1) They may implicate you by association in their lies/crimes
2) There low character will make it more probably they will cheat or scam you in the future
3) Many grifts are predicated on involving the victim in a crime
4) We should ostracize scumbags to not incentivize this behavior
Stay away from murderers, thieves, liars, and police in general and you will be much safer.