Why would someone launder money?

Answer 1

Here's a scenario in which one would want to launder money:

I've just robbed a bank. I took $10,000. But that $10,000 can't just appear in my bank account, can it? It wouldn't make any sense, and the police would find out I'd robbed the bank. So, I launder the money. I give it to my rich grandpa, and grandpa gives it to me as a "Christmas present." Now I have the money, and the way I got it makes sense, so the police suspect nothing. And that is why people launder money.