These groups quickly degrade into memes about how buying and holding these stocks forever will make people rich. They chastise anyone who even considers mentioning an exit strategy.
When the stock begins to decline, early investors in these groups will quietly exit while using the group to convince others to "buy the dip" and have "diamond hands".
Don't believe the narrative that this is a simple transfer of wealth from wealthy banks to Redditors. It's also a massive transfer of wealth from Redditors arriving late to the game who aren't in on the joke to those who are.