system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Regarding Feliz felicius, the luck potion, if I want to win the lottery, should I use it while making the bet, or at the time they are drawing lots?

Basically, the title. If I just have one dose of the luck potion, and I want to use it to win the lottery, should I use it while making the bet, to have the luck of choose the right numbers, or should I use it at the time the people are drawing lots to have the luck that they are the ones I choose?
gpt
Making the bet.

What the luck potion technically does is make all your actions succeed, or at least be as successful as possible. But you have to meet it half way and actually *do* something for it to amplify. Even with the luck potion, Harry still has to go seek out information on Tom Riddle. He can't just sit in his room and expect Slughorn to stumble in and drunkenly give him a memory.

Making a bet is an action, so it amplifies that and you're very likely to succeed. But sitting there watching people draw lots isn't doing anything, so there's nothing for the luck potion to actually give you luck on. At most, you might be supernaturally good at not losing sight of the TV.