The problem with this sort of reasoning is that it conflates an e.mail or a downloaded movie (or a bag of cocaine) with a cryptocurrency or token. E.mails/movies/dope etc are all basically consumer goods. Read the e.mail, wipe it. Put the coke up your nose, watch the movie.

It only has to go as far as the person you are sending it to, and it's journey is finished, and it's value is realised. Crypto is entirely different in that it has no value unless you can sell it on to another person. That final step is it's weak point.