As per the usual activities of the NSA, they seem seriously focused on destroying software security, hacking into networks all over the world, installing backdoors, and building massive central points of failure. Listen to hear more details revealed in the Snowden documents.

Link to the article by @samfbiddle:
https://theintercept.com/2018/03/20/the-nsa-worked-to-track-down-bitcoin-users-snowden-documents-reveal