Everyone is still on a high over Pokémon GO’s success, though one analyst thinks it will be fleeting.

Michael Pachter is well known for his controversial analysis of the games industry. His job as an analyst, after all, is to look at market data, analyze it, and provide feedback about what direction he sees the industry going in. Sometimes he’s right, sometimes he’s wrong. His latest target? Pokémon GO.

The app based on the popular Nintendo franchise launched last week to huge success. Millions of players worldwide have already downloaded it, sending the app skyrocketing to the top of the App and Google Play stores. Speaking with Bloomberg, Wedbush Analyst Michael Pachter doesn’t expect the game to have a lasting appeal thanks to the fickleness of gamers.

“The game requires couch potatoes to get off the couch, and the novelty will wear off when they get tired or when their phone batteries die. I give this four months at the top of the charts, then it will fade.”

Despite Pokémon GO’s success, the app has been causing a few problems beyond server issues. Hackers are using the popularity of the app to gain access to Gmail and other Google apps, and robbers have begun leering unsuspecting players into traps. So while there’s some good fun to be had, players should be wary.

Pokémon GO is available now on compatible iOS and Android devices. The game is free-to-play with microtransactions available for purchase.