This and the next few posts will be about a legal document known as a "power of attorney" (POA). Suffice it to say- you need one, even if you're young and healthy, because it will save you and your family untold trouble and expense down the road.
I will discuss the different types of POAs, and how easy they are to get.
However, just keep this in mind- if you become incapacitated (due to dementia or due to illness), nobody can manage your affairs because you never gave them the legal ability to do that. If somebody needed to take care of you for an extended period of time, they would have to go to court in order to secure that ability. It would cost well in excess of $10,000. Just for reference sake, a POA can be had as part of a simple will package for less than $500. It doesn't make any sense to do anything else.