you never need to drain when the coin has gone down, why drain wait, always one step back and two forward happens with the coin so in any case you will be in the plus if you don't drain

A scheme that works on crypto: the owners raise to a certain level, and then lower it, until the volumes increase due to players who enter seeing the potential. Then they raise and lower it again and wait for those players who bought at the peaks to exit. As soon as the volume builds up, they start pulling it up again with the same money, enticing other players again.