They are pumping their own coins with the hopes of luring people like you (people who watch new projects) into the hype so they can dump on you. They rinse and repeat this process multiple times a week (hence why so many SOL projects are dead). With sites like Rayidum, it's way too easy to inject new liquidity into your market cap.
this is the truth here, meme coin is just pump and dump, there are some anomaly where a certain meme coin can reach at least near billion of market cap and can hold its market cap for long such as shiba inu and so on but thats just one out of thousands of meme coin generated, most of the meme coin are just outright pump and dump, the whole chart of the meme coin where it could multiplty its value within short amount of time is just a show, eventually the pumper gonna sell their bag and then the coin itself will just go back to its previous price or just dumping into zero.
entire meme coin chart is generally just an artificially made shitshow.
there's nothing really that could make these meme coin pump looks natural, most of them are just obvious artificially made pump, if you witnessed certain coin getting market cap into millions just within a short time you can almost be sure that there's whales behind it, just see the swapping history.