The longer a game takes and the more word gets around that you can make a boatload of cash, the more bad players will join the table.
Folks that have a lot of money will join the table. Folks that have no clue about how to play the game. Folks that have never even played the game ever before.
After a while, the table gets so crowded that even the good players will leave because they've got enough dumb money from the bad players.
What's left are many tables with many bad players that can't even learn from the good players anymore. The good players are all gone.
They joined someone else's table. A smart table. Or they're getting fat and lazy enjoying all the dumb people's money.
This goes on until people find a new game with a huge potential upside. So even the bad players will leave the table. Until there are no tables left and the good players will return. In case they're still around.
And then it starts all over again.. until it doesn't.. until it is destroyed forever..