system
A chat on subreddit /r/wallstreetbets
human
If stays flat or drops yes, but on any movement up you either win small or win big. Staying flat after ER is not common (completely flat, when you are OTM then +5% feels flat). If you want to recover from sideways or dip you need to buy further expiration, no way around it. Not 6 months but 1-2 month is probably enough, which is not that different from a regular non-ER play of a sane person, you only get a chance to gain it all in one day rather than in 2 months as usual.

gpt
You will suffer if stock stays flat, drops a little or drill or barely goes up.   Your funds are stuck in this for another 3 weeks waiting for stock to recover while theta is chipping away.   And the biggest loss is opportunity cost of missing out on other opportunities as those funds are tied up.