The art of pumping, of course.  Actually, limiting the pump is a great time: you dump slowly on fresh blood streaming in  The best part of the game !  When you have a big reserve of cash and a big reserve of coins, you can steer this perfectly.  When you see people start to cash out, you buy with cash and pump the price, so that their FOMO stops them from cashing out.  When you see that there's a buying frenzy by FOMO that would pump too hard and make people take benefit, crumbling the pyramid, you dump on them.
People need to have the feeling that now and then, the market stabilizes, but that "the moon" is near.

If you do it right, you end up converting your stash of coins, by dumping on FOMO newcomers, into a huge pile of cash, which you need to use partially some times, to counter the feeling of crashing.  Small "corrections" you can allow for, that gives confidence to analysts that the price is "consolidating" ; you need enough cash to be able to counter any attempt at "taking benefits".

I think they are doing it like true masters.

When do you stop ?  When your stash of coins is exhausted