Everything you mentioned are related to privacy and decentralization, people don't care with that, as long as Trump talk about Bitcoin and do something that looks like he support Bitcoin even it makes Bitcoin become more centralized, people will call it a win.
Similar like your first question, I'd like to know what Trump will do to both Keonne Rodriguez and William Lonergan Hill (Samourai wallet's developers).
The US government will not openly attack Bitcoin when it promises to acquire more Bitcoin and never sell them. However, these are promises, time will tell.
Acquiring more Bitcoin and never sell them actually attack Bitcoin because they're want to control Bitcoin.