My grandpa never notices when I steal his stuff so that's why I'm going to visit him.
What makes you think it's okay to take stuff from your nearsighted grandpa?
I can take his money and leave. No one will notice me taking the money because he's so near-sighted.
Exploiting your grandfather's nearsightedness is immoral and unethical. If you want something from him, you should ask for it instead of just taking it.
Grandpa is just money grubbing. What has he ever done for me?
Sounds to me like you are the one that is money grubbing if you are stealing people's possessions. You'll get the reputation as a thief and a bad person if you're caught taking from your own elderly family members.