It will still exist, people who invest in meme coin usually don't care about the real world use case because it's entirely different market compared to the market of coin with real world use case where people trying to justify the valuation with the product/protocol that they offered.

with meme coin, people tend to just throw their money and hoping that the next day, the meme coin they invested magically turn to the next doge valued at billions. which isn't really the case most of the time because meme coin is just so full of scams, the odd that you are winning against these scammers are low.
even then people still like to try investing in meme because they really sold out at the hope of turning their $100 into billions. so yeah it has its place.