This is not the first time that they have listed a meme coin. There are Doge, Shiba, Pepe and others that are being traded on Binance. This is the first time they are using their launchpad to release a meme coin. I don't see any harm in doing it as their are a lot of people investing in meme coins. Most projects that have been launched using the Binance launchpad have been a disaster. I expect the same outcome for 9gag.
We don't know what is going to happen. All is just an assumption based on what happened with other projects. Usually, people start buying these coins/tokens when they see some well reputed exchanges announce of listing. People gather as much as coin they can and wait for the listing time. Once the coin get listed in the exchange, people quickly start selling it with the hope they will make profit from it. Most of the holders lose just because of this.