We registered the EPOA my Mother had put in place when we realised she was not managing her money well, she surcomed to pressure from people outside the family and lost a lot of money. To a casual observer they would not have thought she had a problem, but she did have Altzehimers, Mum was not happy that we registered the Pof A but it was in her interest. OP suggest you take advice if you are concerned, often the ability to understand consequences is one of the first senses affected by dementia, being unable to understand why you are concerned and fixated sounds wrong. I would also be concerned how a GC has persuaded an older person to part with a large amount when they can not afford it, it could be seen as financial abuse.