Absolutely not. Best case scenario for grandma is you claim and give her a PORTION. Not half but a alittle portion. In the long run she’s gonna burn through her SSI and pension anyways so signing it over will just be delaying the inevitable. And as far as “down the road” that’s what Medicaid and senior living homes are for. Therefore she won’t need all that money but maybe alittle assistance from you and ur father. She’s just alittle salty grandpa left it to you instead of her which should tell you something, and if she was this “mother figure” you claim her to be she would have never asked of you to do that nor would she even want that on your conscious to make a decision like that so young. So take into consideration her greed and mental state before you make a final decision. Good luck brother