I won't pay for it.
Why are you not willing to pay?
I do not want to pay for things I do not believe in.
If you owe the money you are expected to pay the bill. It's not good to avoid paying for something you owe.
Fuck that, there's too many risks in this life already. Why should I pay for someone else's bad investment?
If you owe a debt you need to pay for it. It is unfair to let other people suffer because of you decision.