system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does money laundering work?

I get that it's used to legitimize ill-gotten gains, but how and why?
gpt
How: You make a lemonade stand. You sell lemonade for $1 per cup. But say you also sell drugs on the streets at night and you made $100 there. You then put the $100 in the lemonade stand and tell the government you sold 100 cups of lemonade. Now the money is cleaned.

Why: You do it so that you can have it in your bank account.