HAVING dealt with numerous semi and full crazies in my life(about 30 years in public sector employment on the front lines so to speak) if you want to get some traction with her you are going to have to go the extra distance and make her totally comfortable with the process, which includes letting her know you will meet with her at her bank so she can immediately deposit the funds involved and never have to transport them anywhere. She is freaking about being a potential victim so you have to remove that possibility from her worry list.
People under stress like that are out of their element and even the most logical thing may be beyond the comprehension of the individual suffering. Layout a well thought out process that addresses all her concerns and she will see you are not trying to take advantage of her and you should gain some ground... if you are willing to do whatever it takes on her schedule and not yours.
Not saying it is rational or even possible, just say'n you address her fears and she will calm down.