I'm 73 and not remotely like that, but who knows what the future may bring? If a get to that point fortunately my daughter is smart and we have a good relationship. Even now I get so many bullshit calls that I only answer calls from my contact list, which is immense. If it's just a number I hang up. Not that I would fall for anything but I figure it's a good habit to be in against the time, if it comes, when my brain starts to fail. If it's important like a doctor not yet in my contact list they will leave a message.