If they blatantly attacked bitcoin infrastructure it would first of all be an admission of fear and weakness. 2nd it would have the opposite effect. The community would rally together and all the free advertising would all serve to increase the bitcoin price. I hope they try.
LOL ar Jamie Dimon and attempts by China.
Bitcoin can't be controlled as its reached global escape velocity 4-years ago in 2013. Hahaaha.
So we consider these attempts free advertising? =)