Medical research confirms one of the first things people have trouble with in the very early stages of dementia is managing personal finances. This means people can make very expensive financial mistakes, often before anyone notices there is a problem. I have seen this happen, and it is heartbreaking.
You never know what the future holds, so early planning for late-in-life health issues is essential.
For instance, you may notice that a loved one seems more disorganized than usual. Bills may pile up. The loved one may have difficulty remembering names and fumble for the right words. See a doctor if there are concerns. Alzheimer's Disease and most forms of dementia are progressive. This means it will get worse over a few years.