I'm not totally surprised, part of war games strategy is to explore viable threats to USA via economic tactics to undermine a country. Surely crypto is large enough to be part of currency flow and the ability to transact with entities across borders. North Korea frequently fraudulently produces currency of other nations as part of its renegade state activities to self finance itself by any means available to them, they also involved in crypto use in various nefarious schemes I think and so to CIA is part of the counter to that I would guess.
This is exactly that scenario. They wouldn't want crypto to dominate over fiat, but in case if that ever happens, or in case another country uses it well enough, they need to be ready for it and can't just ignore it completely. I keep saying that China keeps on banning it all the time but they probably buy it lower after saying they banned it, I have seen them banning it 10 times already.
So, nations could be against it or support it but they are definitely doing something to be ready in case whatever happens. Those bad nations like NK would be taking advantage of this situation without a doubt, that is just how it is right now in the politics. So, I agree that it is very normal for CIA to be involved with it, probably FBI is even bigger involved considering the arrests.