so in theory, one could make a torrent network whereby via a block chain, you send a file and then lose the ability to access that file? Assuming you don't copy it of course.
No, with my understanding of the word "theory". On the Bittorrent network the copy of Sylvester's Stallone film is still playable and valuable no matter how many copies are in existence. On the Bitcoin network people value only coins that are "unspent" as marked by the "the most current and heaviest blockchain". The "spent" coins continue to exist, but nobody gives them any value.
You may have other meaning of the word "theory" on you mind.