The reason why meme coins are trending is because some of them actually managed to gain substantial value in the past and their investors manage to earn significant profit from them, now based on human nature, when we see that there is profit somewhere, we start chasing that with all our strength because we don't want to miss out on it and if we miss out on the first one, someone will bring another one from the same category to lure in those who missed the previous one and we naively start running behind that.
So, there is nothing really special in meme coins, they are all just useless crap providing no utility or anything, but it's just us who are hyping them up every single time just with the hope that if it gets famous and gains value, we will get great profits from it even if millions of others lose money due to it.
People see that in order to earn from those coins nothing is really needed out of them, since those that invest in meme coins are not really smart investors which found a gem among thousands of shitcoins and they simply got lucky to pick the coin that just happened to skyrocket.
And people begin to think that if someone can obtain those profits without any skill then they want the same for themselves, but they do not realize the massive problem with their idea, as most shitcoins collapse without growing at all and the majority of those that invested in the right meme coin still lost money as they sold at the wrong moment.