Your economic hit man worked for private companies. Not the CIA. And some people seem to forget that the CIA does not operate in the USA. They collect foreign intelligence. Intelligence on terrorism or other criminal activity is handled by the FBI inside the U.S.
Now, the CIA might launch an economic attack on a foreign army, for example. They might lock up their bank accounts, print counterfeit money to crash an enemy's economy.  That, and bombs, are how you win a war.
The problem with these claims about the CIA destroying bitcoin is that they make no sense. Show me a motive. The CIA has very smart people who do not do things for no reason. What is the smart reason for doing this?