My husband has started giving things away. Any advice?

It worries me and the family. He will buy something one day and not want it the next. He bought a ladder for $300 and couldn't figure out how to use it so he wants to give it to a family member instead of returning it. I cleaned my closet because I gained weight and gave some clothes away. the next day he cleaned out his closet and wanted to give away expensive clothes that fit him. He has never been a overly generous man to others financially but now he keeps trying to give large amounts of money to the children and grandchildren to the point that they are uncomfortable. yet he will not part with some unless things like old sheets or broken tools. he was scammed by 3 different people last year 1 being a doctor for over $5200 and it is now in the attorney general's hands. this I was prepared for. I have power of attorney now. I am lucky in that we have an honest family but I am afraid that he will be taken advantage of again I seem to be undoing his finances daily and have informed banks and credit card companies to check charges above a certain amount. I feel that I am doing okay in this line. my question is does such a change in behavior indicate an progression of his disease. if so should I prepare myself for his needing home care or assistant living? and how do we get the keys away from him he is dangerous on the road.