Because
Sleep dreams that the tendency to suddenly become rich

This is not really normal because meme coin is more dangerous in this crypto market. They always collect money from investors by showing amazing attractive offers. In reality their project does not last long in the market because most of the team members of meme coin are new generation and they have less experience. They are coming to the market only to grab the investor capital completely.
All the blames is on Elon Musk, Doge is just a meme coin when he shills it to the community, it creates a huge noise Dogecoin became the most talked about and the most hype of that period from then developers tried to imitate the success of Dogecoin, and they succeeded on some meme coins like Shiba Inu and Pepe coin, but I doubt these meme coins are created to last like all the top coins in the market.
Right now many investors are losing their money only the creators and developers of these meme coins are making money, The time will come when people will get enough of these meme coins, hopefully, it will come sooner, We need more innovative coins, not Memes.