I will say that is correction because I do not know if that is manipulation from some people or groups or a correction for the price before the price increases again.
If you ask about the next manipulation, I do not think that anyone can know the right answer because many possibilities can happen to bitcoin.
Rather than thinking about "when," it is better to enjoy this moment, and you can try to make a profit from many coins, including bitcoin, so you do not have to worry about manipulation or not.
If you still search about that, I am afraid that you will miss the chance to make a profit this year because I see this year can be a good year for you to profit back.