https://www.bloomberg.com/news/articles/2018-05-24/bitcoin-manipulation-is-said-to-be-focus-of-u-s-criminal-probe
This is complete waste of time. It seems they have no other pending cases against the investment bankers, the traders, the stock manipulators, the ever rich company directors that have a way of manipulating their share price so that they can continue to make themselves richer because of their payments via share options. Whatever, the reason why they are embarking on it, I am sure they have a whole lot of tax payers fund that they want to waste as they should be ready to carry out their investigation to go to several countries because for them to have started this, they would have limit it that the manipulation is within the US jurisdiction. We also need to consider the legal jurisdiction and what if those people found wanting are in countries with no repatriation agreement with the United States then its a waste of time and money as they wont be brought to justice.