Michael Novogratz flipping from predicting bitcoin price of 40,000 USD to 8,000 USD is nothing more than a trader reaction to the current market information he is feeling right now. Traders are the most paranoid person I know when it comes to investing. They literally change their minds on a trade in a second. Another theory, this one darker, is that he wants to the public to dump bitcoin so he could buy it at the bottom - - 8,000 USD his preferred price. No self respecting trader would communicate to the public his trading strategy lest he wants you to be at the opposite side of his trade