Sure, but closing the default port limits the tech to people with the interest and technical knowledge to proxy it in such a way. ISPs could also do DPI or timing analysis to id the stream and slow or block it. It was tried successfully (by Comcast) on bittorrent in the the early 00's and is one of the things that triggered the whole Title II fight in the first place.

>It was tried successfully (by Comcast) on bittorrent in the the early 00's and is one of the things that triggered the whole Title II fight in the first place.

torrents are hard to hide because no matter how much encryption/obfuscation you do, you can't hide gigabytes of data being transferred between residential IPs, using random ports. bitcoin uses megabytes of data per hour, which means it's much easier to use stenography to hide it.