Think about oneself? Number one?

Scrooge does have a right to think and take care of himself but this isn't entirely what you should do, Scrooge needs to help others with his spare money, it makes you feel good. Feeling merry and happy is what Christmas is about, when you don't have enough Holidays in your heart you start to feel down and depressed. This is why people should always be happy with what they have and think about others once they are done with theirs. The more charity you do the better you feel about yourself and what a good deed you did. As Scrooge thinks of himself he thinks that he needs a better life with friends and family and cousins. How he doesn't feel happy about himself later and regrets all the things in life he did not do that he should've done.