These type of coins are quick in & out, only the first 5-10 mins buyers will earn from this. If it already pumped a lot then I suggest don't put your money on it. If ICO was popular last bull run, meme coins are now the thing that makes some people earn some big amounts. I think these coins became popular because of binance smart chain and DeFi platforms now, creating tokens under bsc and listing them on those platforms can be done easily and not that expensive. I think the term rugpull was also created because of these meme coins.