Whatever you have said doesn't apply for all the memecoins especially the ones in SOL chain because most of them are shit coins and gets rug pulled within minutes so it would be foolish to buy when it's dipping down. You may have accumulated wealth through this but not a recommended method with memecoins but we can do this with reputed Altcoins and have to patiently wait for the worst moment to sell.
But, what if they are the devs or a part of it? You know, whales are wealthy and prolly have good connections. If not, buying at the dip, they can also start the pump by buying more and that makes the people to FOMO, which at the same time going to be their end. Meme coins are all shit coins but even not meme coins, there are also cryptos who are considered as shit.
I think the goal of the OP to post here is for the meme investors to HODL their meme coins, which is another tactic for the whales to profit and make those poor investors lose. We can only be glad if those meme coin investors do also have a solid crypto and they will also adopt the HODLing technique to them.