Mixed tenses

Lets say a politician A and his secretary B were involved in some clever business scam. B feels ashmed of her involvement in the wrongdoing, so she's about to make a public announcement about their scam. A scoffs at B and wants to say if they believe you at all, which is unlikely, you'll have to go to jail, and that means you will lose everything.

What is the correct way to say it?

Even if they believe you, you will lose everything.
Even if they believe you, you will have lost everything.
Even if they believed you, you will have lost everything.
Even if they believed you, you would lose everything.
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Thank you