Well i dont see the any reasons that could explain that meme tokens are going to the moon. The last pump is only because the tweet from someone famous like elon musk. There is no value behind it and even vitalik butterin just happily sell it and make it dump so hard. I do believe many meme coin are useless and you should not invest on it cause it pretty dangerous, most meme coin have an anonymous developer which i dont think good cause they might be run away and also not credible enough to take as a reason to buy the meme coin.
If the pump just results from a single tweet or support from a celebrity, then it is not going to last. The situation can change however, if some of the promoters take an active interest in the development and make the coin acceptable to ordinary cryptocurrency users. And in case of Dogecoin, I am yet to see any such effort from their part. The promoters and large holders seems to be blinded with the sudden influx of wealth that landed in their hands, after the 100x bull run they had in the last 12 months. They are least bothered about the long term survival of the coin.