manipulation is possible if you are a trader that holds enormous amount of token supply you are able to move the market whales can easily control the market because they have large amount of coins.
If the market was being manipulated in some ways, there there is a chance that the cause of the red tide are being controlled by the whales and the other big investors. If is true then, if they attract more traders them will decide again for another sell off.
in my opinion that is impossible because what I know now is that the market is still not stable and has not returned to good, so now many people are investing in Altcoin while waiting for the market to stabilize because the market has been a few weeks ago until it has stabilized