Hello! I'm sorry to hear about the situation!
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Offering an individual money in exchange for refusing to cooperate with the state in a criminal investigation
or proceeding can potentially constitute a crime as well, as it could amount to witness tampering.
In any case, if an individual is injured by another's malicious actions, he/she can sue the party who injured him/her to recover the value of the damages.
Therefore, an individual doesn't typically need to feel compelled to accept money offered unless the terms are reasonable and fair (or better), as the individual may sue to recover the value he/she is owed if the party does not willingly pay.
Accordingly, you should have your attorney evaluate the details to help you determine what you're entitled to and to help you negotiate for that.
Regardless, a person doesn't have to refuse to cooperate with a criminal proceeding to recover financially and an individual could sue to recover monetarily instead.
Further, it's also worth pointing out that, one the matter reaches the state, a victim doesn't get to decide to drop charges. Only the prosecutor can do that, though the prosecutor may consider the preferences of the victim when making such a decision.
I know that this probably isn't entirely what you wanted to hear. However, it's the honest truth and I know you want a truthful answer above all. I hope that you will click accept so that I am paid for my time and effort spent providing this information.